Oxyplot Draw Vertical Line

MATLAB Plot vertical line. Find lots of traceable lines worksheets at KidsLearningStation. I have a panel dataset and I want to create a graph that shows the development of a certain variable over time (for a certain country), plus the growth rate of this variable. [gtk+] GdkGL: Fix and clean up gdk_cairo_draw_from some dummy vertical split code Wed Nov 26 10 add an extra line of padding so right margin aligns Fri Nov. dllUpdate/log4net. Possible uses: Mark session open/close, mark time of regular news release, any other relevant time. This is because we're graphing all points where y equals some number. net c# examples. Then draw your line vertical. 03/30/2017; 8 minutes to read +7; In this article. Once you have learned how to measure proportions and check angles, the next step checking alignment. Connectors can be straight , elbow (angled) , or curved. I would like to draw a horizontal and vertical line for my xy-graph control. At no time should the lower edge of the T square blade be used as a base for triangles. Hope you have fun learning. These lines should be independent of the zoom factor. Checking alignment is the third of the drawing techniques you need in order to master the art of realistic drawing. Abs value and when this occurs, the line style to reflect this has happened (by using color and or LineStyle). The easiest way to draw a regression line in SPSS is adding it to a scatterplot. Also, notice that the vertical edge of the paper is parallel to the vertical edge of the t-square. use steam://run/ as a command line argument to prevent the game restarting via the Steam client. Sometimes, you need one of those fat, thick lines to break up your text. How to plot positive and negative values on both sides of the axis in Excel? you want to draw a line chart with two lines (sense and antisense) separated by the 0. exeUpdate/Updater. So is there a way in drawing, I can draw a geometry and make it constrained in an orientation or position where I want. A slope of 0 creates a straight line. Assume this Data. Icon Bar Menu Icon Accordion Tabs Vertical Tabs Tab Headers Full Page Tabs Hover Tabs Top Navigation Responsive Topnav Navbar with Icons Search Menu Search Bar Fixed Sidebar Side Navigation Responsive Sidebar Fullscreen Navigation Off-Canvas Menu Hover Sidenav Buttons Sidebar with Icons Horizontal Scroll Menu Vertical Menu Bottom Navigation. The h= and v= forms draw horizontal and vertical lines at the specified coordinates. I have a line graph pivot. get(gca, 'ylim') gives you a 2 element array with the lower limit on the y axis, and the upper limit on the y axis, whatever they are. We use cookies to ensure that we give you the best experience on our website. In access 2013 you can use a 'line' object to draw horizontal or vertical lines. I removed. For instance, if you like to put vertical lines between text and you already have some paragraphs floating next to each other, you. And what form of data interpretation could be more pleasing to the eye than the dependency chart? Therefore, the entry will concern a tool that allows you to draw charts in WPF C # - OxyPlot that facilitates this task. how to draw vertical lines on the plot?. You can change drawing's Line Width, Dashed Style, Arrow Style, Line Color, Fill Color, Transparency and Layer properties. Hi, I want horizontal line in the 2nd row of a grid and the following code isn't working. The last entities to add are the center lines. Make sure the Steam AppId is the correct one for the selected application and that the Steam client is running. Hi TZ You could use "/" or go to menu View-Toolbars- Select Drawing and you can draw a line. Introduction. All lines will be drawn individually. How to add vertical/average line to bar chart in Excel? When you use a bar chart to show the data, in some cases, you may want to add a vertical line into the bar chart to obviously show the average of the data as below screenshot shown. You can edit the nodes in a line to create curves. In the webcastcode package, you have an example of OxyPlot plotting a sine wave. Word inserts a thin, inky stroke, running from the left to right margins. How to define how line matches to our data set?. Some of the graphical characters used to draw these basic shapes are. I use PowerPoint for drawings and diagrams. Vertical axis: Independent variable 2 Horizontal axis: Independent variable 1 Lines: iso-response values The independent variables are usually restricted to a regular grid. The second argument of line is a list of the y values corresponding the x elements, so it will make a line from (x1, lower y limit) to x1, upper y limit). 5,6) and they should go till p=c(0. The default value is true. WindowsForms. Notice how the vertical line drawn down from the corner of the eyes lines up with the edge of the nose. Vertical lines help determine if a relation is a function in math. The first line point to point, left to right on the x axis was fine, however I can't draw the upward vertical line as the cursor will not leave the original x axis. Here in this session we are going to draw some basic shapes like horizontal line, vertical line, rectangle and splitting rectangle etc. Enter a negative value for a concave (inward) slope. ClipTitle Gets or sets a value indicating whether to clip the axis title. In your document, click where the line should begin. I have a WPF application using OxyPlot to display multiple line graphs with a common horizontal time axis. seed(12345) # reproducible random numbers datx <- rnorm(100) # some example data. ActualModel Gets the actual model. for horizontal line we will use hr/, Like that is there option for vertical line. 19 Canada | Arroyo Municipality Puerto Rico | Sweden Sotenas | Williamson County Tennessee | Reeves County Texas | Fairfield County Connecticut | Keewatin Canada | Marshall County Alabama | Bryan County Oklahoma | Bayfield County Wisconsin | Lorient France | Roosevelt County New. P:Newtonsoft. Messages sorted by: [ Thread ] [ Date] [ Author] Other months; Messages are ordered newest-to-oldest in this index. Typically, when you draw on a form, you handle the form's Paint event and perform the drawing using the Graphics property of the PaintEventArgs, as shown in this example. Draw a line in c programming using line() and lineto() library function of graphics. Forms technology and allows you to build native iOS, Android and Windows Phone apps in C#. 2Background OxyPlot was started in 2010 as a simple WPF plotting component, focusing on simplicity, performance and visual appearance. Creating graphs in WPF using OxyPlot. 2016 2:17pm #115019 | Moderator 2232 Posts When you need to draw a vertical line on charts for better visual orientation you can use following code to do it: Add this into EA Wizard / […]. We look for such a and b that gives best matching line. Draw horizontal and vertical line in Microsoft Office Word 2013 - will show you how to insert a line (horizontal or vertical line) in Microsoft Word. So you have got that you can constrain anypaint tool to a straight line horizontally or vertically by hitting ctrl. I want to draw lines on a drawing. Pipes display with centerlines in hidden line view. Hi, I want horizontal line in the 2nd row of a grid and the following code isn't working. org domain (July 4, 2013) OxyPlot listed as a cool library on Scott Hanselman's presentation on Xamarin Evolve ! Changed the OxyPlot core to a Portable Class Library (PCL). Open up Color & Thickness menu to make your selections. But struggle to draw a line which can be horizontal or vertical. LIFE EXCEL HACK - Adding Vertical Line in Graph #1 eXcelMathS! Ever wonder how to add vertical line or lines to graph to make it look nicer instead of using the "line" picture from the shape. Adding Horizontal and Vertical Lines to MS Project I would like to have both horizontal and vertical lines shown on the Gantt chart as well as the Task portion. If you want to set up your business Web page so that. As a quick summary, here's all you have to do to draw a straight line in GIMP: Have an image you want to draw a straight line on. Based upon the total duration of the time depicted, divide the timeline into equal, reasonable sections using small vertical line segments or dashes and label each accordingly. in word 2013 when I want to draw an arrow or a line it cant be straight in 180 degree in page and it is always a bit curve to up or down for example draw a rectangle and on its border line draw an arrow ( the arrow must be exactly on rectangle border line ) and you will see that the arrow is curve and is not on rectangle border. OxyPlot#IView#ActualModel Gets the actual model in the view. Ask Question Asked 6 years, 3 months ago. We've moved. So these are possible ways which are generally used by Photoshop professional to draw a straight line in Photoshop depending on their requirements. An area graph displays elements in Y as one or more curves and fills the area beneath each curve. I have a server application that is processing loans that are in different timezones. So, How can I draw straight vertical/horizontal line?. Remember that you can force a line to be perfectly horizontal or vertical by holding down the Shift key while you draw. MATLAB Plot vertical line. And what form of data interpretation could be more pleasing to the eye than the dependency chart? Therefore, the entry will concern a tool that allows you to draw charts in WPF C # - OxyPlot that facilitates this task. Line is drawn vertically from plan. Example 2 - Drawing Support & Resistance Trend Lines. Our product line contains in-line gas purifiers, including refillable, indicating, S-shaped, and metal body types. La revista Tecnoamérica tiene como propósito desarrollar una cultura de publicación y comunicación de los avances tecnológicos en ingeniería mecánica, ingeniería eléctrica y amas afines. Your child will practice and develop her pencil control skills by drawing downward vertical lines which will help her when she begins writing her letters. box and whisker diagram) is a standardized way of displaying the distribution of data based on the five number summary: minimum, first quartile, median, third quartile, and maximum. Save Cancel Reset to default settings. It is very important you practice drawing trend line as much as possible, after a while you will get used to it and it will become second nature. what i want is to create an app that draw vertical line on a bitmap image. The reason why I do this, is to use the vertical column to highlight a specific point in my Excel chart whilst I am presenting the data to my stakeholders. Tooling for WPF was a top customer request during our interviews with our customers and the surveys. Adding Horizontal and Vertical Lines to MS Project I would like to have both horizontal and vertical lines shown on the Gantt chart as well as the Task portion. Creating graphs in WPF using OxyPlot. Draw horizontal and vertical line in Microsoft Office Word 2013 - will show you how to insert a line (horizontal or vertical line) in Microsoft Word. So these are possible ways which are generally used by Photoshop professional to draw a straight line in Photoshop depending on their requirements. Assume this Data. Possible uses: Mark session open/close, mark time of regular news release, any other relevant time. So is there a way in drawing, I can draw a geometry and make it constrained in an orientation or position where I want. The style of the plots is inspired by the books written by Edward Tufte and Stephen Few. Try to draw the lines near the minor axis a little longer, but draw them a little shorter as you move toward the major axis. I essentally need a StairStepSeries, but with any negative values replaces by their Math. So these are possible ways which are generally used by Photoshop professional to draw a straight line in Photoshop depending on their requirements. RadChart Overview. ItemSource设置为List,在这儿使用一个列表的二维数组. This tutorial will show you where it is located and how to use it to get the lines you want. ; Exmaple: <div class. Thanks Bart – a really good learning article, especially as OxyPlot has little on-line documentation. The current line number or 0 if no line information is available (for example, HasLineInfo returns false). In the webcastcode package, you have an example of OxyPlot plotting a sine wave. Assume this Data. PDF | On Jan 1, 2014, Andres Vargas Gonzalez and others published SketChart: A Pen-Based Tool for Chart Generation and Interaction. The system can handle a full network of channels, a dendritic system, or a single river reach. Is this what you want? set. Width Width measurement is in screen pixels. As a quick summary, here's all you have to do to draw a straight line in GIMP: Have an image you want to draw a straight line on. Telerik Chart for Xamarin is a feature-rich, intuitive and easy to use data visualization control which employs the Xamarin. linq, array, ajax, xml, silverlight, xaml, string, list, date time, object, validation, xpath, xslt and many more. And I would prefer not to change the lines every time the zoom factor is changing. Take a look at these lines: Notice anything about all of these. Quick use of my favourite search engine revealed a number of people asking how to do that but no very helpful. Re: How do I constain a line to vertical or horizontal? I must be doing something wrong. You have to change the default for all vertical lines and this is how: Open any chart > Drawing > Vertical Line > Click anywhere on your chart > Right click the vertical line drawn, select Format Vertical Line > Labels > Untick 'Show Labels' and tick 'Set as Default' > OK > Right click the vertical line, select Remove Vertical Line. Thanks for your help. There is a little known open source plotting library for Xamarin. This tip is about how to add a vertical line in your chart. I'm trying to figure out the best way to draw a line between two existing points on my graph in WPF. Assume this Data. In the Change Chart Type dialog that appears, choose the X Y (Scatter) option that shows straight lines with. With the Universal Windows Platform in Windows 10, your apps will now run on a number of device families and automatically scale across the different screen and window sizes, supported by the platform controls. sql PRAGMA foreign_keys = off; BEGIN TRANSACTION;. Line shape in WPF, horizontal line in WPF,line with gradient effect in WPF,Vertical line in WPF, how to draw line in wpf,draw line in xaml. OxyPlot clone. You can draw horizontal segments to continue the run at the new offset, or click Modify to add only the vertical segment. box and whisker diagram) is a standardized way of displaying the distribution of data based on the five number summary: minimum, first quartile, median, third quartile, and maximum. Add a Vertical Line to a Column or Line Chart: Series Method. I would like to have the vertical lines intersect as legitimate line equations and don't want to just draw over the chart in Paint. WindowsForms. In OxyPlot, a device indepent unit is related to a 96 dpi display. For each of these dates I want to plot a vertical line. The first form specifies the line in intercept/slope form (alternatively a can be specified on its own and is taken to contain the slope and intercept in vector form). In the Change Chart Type dialog that appears, choose the X Y (Scatter) option that shows straight lines with. You can use an empty. The actual model. This discussion was imported from CodePlex amity2001 wrote at 2012-10-03 11:01:Hello world, Is there any way to draw simple shapes like circle, ellipse, square, rectangle, etc. Just one line at a time is permitted, it can be treated as a "temporary marker". I hope you find this tutorial on how to draw a straight line in Photoshop CS5 using Pen tool, Line tool, and Brush tool. Values on x axis specifying location of vertical lines. A slope of 0 creates a straight line. In descriptive statistics, a box plot or boxplot is a method for graphically depicting groups of numerical data through their quartiles. I have problem with point's drawing. This illustration shows you how to draw a vertical line, a line perpendicular to the bottom of the page, using a t-square. I am currently working with the event. NET Content¶ Introduction¶ Introduction¶ OxyPlot is an open source plot generation library that is licensed under the MIT license. A Shape is a type of UIElement that enables you to draw a shape to the screen. I try to change the orientation of stacklayout to vertical, but no change in the line orientation. Contribute to ylatuya/oxyplot development by creating an account on GitHub. Make sure each horizontal line is sideways and parallel to each other. Format Using vertical Line within Cell. There's one trick about motion for drawing straight vertical lines which makes it easier: the drawing tool should be leaned on your ring finger and rests on the recces between your thumb and index finger while supported by middle finger and blocked with the thumb; the pinky is supporting the ring finger and index finger is not used at all. So if the x coordinate of your two points are same, then a vertical line will appear. They have different orientations, however, and will soon have different alignments (Start, Middle, and End, which is the same thing as the typical Top, Middle, Bottom, Left, Center, Right, except SME can be used for either horizontal or vertical alignments) Anyways, enough of my rambling. Instead, I just want to draw a vertical line on every graph on the position of the click. You need to insert a horizontal or vertical line inside the word document to separate data. Introduction. To make it easier to identify when a data range crosses over into a positive value I would like to make the "0" gridline bolder and heavier and leaving the. We use cookies to ensure that we give you the best experience on our website. > vertical line on a graph made with plot(). You can choose to draw your line in the opposite. How to Draw a Diagonal Line Through a Cell in Excel. Contribute to ylatuya/oxyplot development by creating an account on GitHub. To graph a vertical line that goes through a given point, first plot that point. The second argument of line is a list of the y values corresponding the x elements, so it will make a line from (x1, lower y limit) to x1, upper y limit). I simply want to draw a vertical line through a x/y plot at a specific point. When I am starting drawing line on the oxyplot canvas nothing happens. In-line gas purifiers are designed to remove specific contaminants. (also called Linear tool). Telerik Chart for Xamarin is a feature-rich, intuitive and easy to use data visualization control which employs the Xamarin. RadChart Overview. The area between the lines can be cross-hatched. How to draw horizontal and vertical line in Microsoft Office Word 2013. Selecting Size/Color off for the symbol turns off the display of simulation data points. I am currently working with the event. Okay, so we have x, and we have y, so we have the point negative five comma negative two. 5,6) and they should go till p=c(0. You can use this tool to draw a line or arrow into PDF document. Ask the students to turn their papers over and draw vertical lines with the writing tool of their choice. Draw a 7 inch vertical line from the middle mark at right-angles to the base line. Hi, I want horizontal line in the 2nd row of a grid and the following code isn't working. Please contribute!. You need to insert a horizontal or vertical line inside the word document to separate data. Android uses a file system that's similar to disk-based file systems on other platforms. R: Add vertical line to a plot. This will result in the display shown in Figure 2. You can edit the nodes in a line to create curves. In three dimensions. But the line is always showing in horizontal format. Other versions Draw a line or arrow. In access 2013 you can use a 'line' object to draw horizontal or vertical lines. However, you may have to play around with code samples to understand the working of these graph controls. Introduction. I hope this charting tip will help you to get better at Excel. In this dialog, you can add a vertical or horizontal line to current graph layer by specifying the position value, line format, label format, line selectivity and mobility. On-line help River Analysis Components Steady Flow Water Surface Profiles. George Schob. This tip is about how to add a vertical line in your chart. I want to draw vertical lines at some positions in the following R plot. Hi TZ You could use "/" or go to menu View-Toolbars- Select Drawing and you can draw a line. box and whisker diagram) is a standardized way of displaying the distribution of data based on the five number summary: minimum, first quartile, median, third quartile, and maximum. The library is based on. if you want to draw the line to one of the sine functions, matlab2tikz Vertical line in bode plot. Hi! i have a widows form in c#. I have also tried drawing a circle and it will only draw from the original x axis. Learn more about hrv, ecg, spectral analysis, psd, pwelch, plot, line. If you make a mistake while drawing freehand curves, you can erase the unwanted part immediately and continue drawing. use steam://run/ as a command line argument to prevent the game restarting via the Steam client. > > Thanks very much, > Peter. OxyPlot Line Serie drag a data point. Just one line at a time is permitted, it can be treated as a "temporary marker". Some of the graphical characters used to draw these basic shapes are. A segment. This library is not only free/open source but it’s easy to use too. In this dialog, you can add a vertical or horizontal line to current graph layer by specifying the position value, line format, label format, line selectivity and mobility. I generally do these manually, by drawing a vertical line. Show top sites Show top sites and my feed Show my feed. [gtk+] GdkGL: Fix and clean up gdk_cairo_draw_from some dummy vertical split code Wed Nov 26 10 add an extra line of padding so right margin aligns Fri Nov. Messages sorted by: [ Thread ] [ Date] [ Author] Other months; Messages are ordered newest-to-oldest in this index. How to draw a fat, thick line. Was it ever so that one could hit a special key to toggle to enable vertical direction? Yes, Ctrl key to toggle "elevator mode". you can consider me new to GIMP. Such a line. 2015-March Archive by Thread. NET CLI), To draw an OxyPlot diagram, Next to the vertical axis you even see the model predicting negative salaries. - Free download of the 'Vertical Time Lines' indicator by 'file45' for MetaTrader 4 in the MQL5 Code Base. Civil War Sesquicentennial Narratives Project This project highlights Maine people who lived during the Civil War. Angles for fittings are drawn according to the Angles setting in Mechanical Settings. dllUpdate/log4net. I draw the vertical line in the plan using lz routine above. And I would prefer not to change the lines every time the zoom factor is changing. Introduction. Adding Vertical Lines • What if you had this line chart and wanted to add 2 vertical lines, one vertical line on Tuesday and one on Thursday. We manufacture purifiers in a variety of sizes and configurations to remove oxygen, moisture, and hydrocarbons. Connectors can be straight , elbow (angled) , or curved. For the second case, Mathematica fails to draw the line due to automatically selected PlotRange (selecting PlotRange -> All helps). OxyPlot Documentation, Release 2015. Hi All, I am used xamarin. We have this analytics pane which lets you add so many types of lines 😊 ". There is a little known open source plotting library for Xamarin. How do you plot a straight line, parallell to the y-axis in gnuplot? Something like: x = 20? Related Computing and Technology News on Phys. If you make a mistake while drawing freehand curves, you can erase the unwanted part immediately and continue drawing. i have written this now myself in case anyone needs this too, just download the attachment its a script. Issue with using Line tool to add vertical line in Access Report. Changed style and added documentation to oxyplot. These lines should be independent of the zoom factor. Here are some screenshots. Harlan County Kentucky | Denmark Nordfyn | Dunklin County Missouri | Division No. How to draw a fat, thick line. Format Using vertical Line within Cell. The library is based on. how to draw vertical lines on the plot?. The vertical lines to segregate each financial year. How do you plot a straight line, parallell to the y-axis in gnuplot? Something like: x = 20? Related Computing and Technology News on Phys. (also called Linear tool). RadChart Overview. linq, array, ajax, xml, silverlight, xaml, string, list, date time, object, validation, xpath, xslt and many more. Creating graphs in WPF using OxyPlot. I am trying to move the object(s) at each (integer) step of slider. I essentally need a StairStepSeries, but with any negative values replaces by their Math. Format Using vertical Line within Cell. Is there a way to draw a vertical. This library is not only free/open source but it’s easy to use too. Hi I want to know that, how to put vertical line in html. The second argument of line is a list of the y values corresponding the x elements, so it will make a line from (x1, lower y limit) to x1, upper y limit). It's easy to draw lines with Photoshop Elements. In descriptive statistics, a box plot or boxplot is a method for graphically depicting groups of numerical data through their quartiles. Click on the Shapes toolbar. Here in this session we are going to draw some basic shapes like horizontal line, vertical line, rectangle and splitting rectangle etc. The style of the plots is inspired by the books written by Edward Tufte and Stephen Few. When you input two points to plot() function, the default behaviour of the function plots the points on the figure and draws a line between the two points. HOW TO DRAW A LINE IN A PDF. Tips: Hold down SHIFT to draw lines that are at horizontal, vertical, or 45° angles. There's a Line tool designed to do just that. Vertical Lines Now let's try vertical lines. How do I use the mouse to draw line in the plotview? And How do I Add Right click menu in the plotview?. I need to show a tracker consisting of a vertical cursor and a display of the values of all the variables at that time point. How to Draw a Diagonal Line Through a Cell in Excel. The h= and v= forms draw horizontal and vertical lines at the specified coordinates. Hi I would lilke to be able to click on a Data Point and move that point to the top of the. Optimizing line parameters. Box plots may also have lines extending vertically from the boxes (whiskers) indicating variability outside the upper and lower quartiles, hence the terms box-and-whisker plot and box-and-whisker diagram. In-line gas purifiers are designed to remove specific contaminants. it will always delete an older line if it finds one and then draw the new one. For each of these dates I want to plot a vertical line. I'm trying to create a line series chart that displays multiple lines. We'll now see the bars from the Average series on the chart, but we want the Average value to be a vertical line. OxyPlot sample applied on OxyPlot WPF renders blank. The style of the plots is inspired by the books written by Edward Tufte and Stephen Few. Any ploting options for. I use PowerPoint for drawings and diagrams. The problem is, I'm using MVVM and thus need to bind the source from a view model, and the number of series will change at some time; sometimes it needs to show only 2 lines, other times it might display more than 10. First draw a vertical center line by entering 100,-10,0 and 100,110,0. Please run the following commands first if you are interested in!. Enter a negative value for a concave (inward) slope. 03/30/2017; 2 minutes to read +6; In this article. I thought it was int double problem but not sure anymore. drawLine(50,0,50,200); // A vertical line. The first form specifies the line in intercept/slope form (alternatively a can be specified on its own and is taken to contain the slope and intercept in vector form). JsonTextReader. Line shape in WPF, horizontal line in WPF,line with gradient effect in WPF,Vertical line in WPF, how to draw line in wpf,draw line in xaml. Hi I want to know that, how to put vertical line in html. Draw a line between two controls. Creating graphs in WPF using OxyPlot. Because of the structure of XPS files, their description of a document does not change based on the operating system or printer and are consistent across all platforms. line() for each line. January 2013. I am starting first by simulating this process by using a WPF slider control. I have a server application that is processing loans that are in different timezones. The mouse pointer changes to a cross-hair symbol with a line beside it. The best way to go about drawing vertical lines on a bar-plot is to use the annotate capability. h, in this c program we will print horizontal and vertical lines. Add a vertical line to Gantt Chart Excel Stacked Bar Chart - Step by Step. And what form of data interpretation could be more pleasing to the eye than the dependency chart? Therefore, the entry will concern a tool that allows you to draw charts in WPF C # - OxyPlot that facilitates this task. I have problem with point's drawing. Does anyone know of an indicator that will draw a vertical line on a candle that I set to a certain time? Say I want to see all candles that open at 4am GMT on the hour charts. In matlab how can i plot horizontal and vertical lines onto an existing graph? coordinates of the end points of your line, e. Can't draw vertical line - help! Announcements Due to scheduled maintenance from 6:30pm Pacific time, August 23 to 12:30am Pacific time, August 24, customers may experience a delay in downloading products, managing users, contacting Autodesk support (Forums will be available), and creating or editing support cases. In this article, we will learn how to use a few of graph options in OxyPlot. This topic gives an overview of how to draw with Shape objects. Tooling for WPF was a top customer request during our interviews with our customers and the surveys. Use ALT-T or click on L-TYPE=1 on the Status Menu, and click on the center line type in the pop-up menu. Open up Color & Thickness menu to make your selections. you can consider me new to GIMP.