Creating a size-55 auxiliary line

• Choose the Line option, by going to Geometry->Create->Straight line or by going to the GiD Toolbar¹.
• Enter the coordinates of the beginning and end points of the auxiliary line². For this example, the coordinates are (0,0) and (55,0), respectively. Besides creating a straight line, this operation implies creating the end points of the line.
• Press ESC ³to indicate that the process of creating the line is finished. Press ESC again to end the line creation function.
• If the entire line does not appear on the screen, use the Zoom Frame option, which is located in the GiD toolbar and in Zoom in the mouse menu.

NOTE: The Undo option, located in Utilities->Undo, enables you to undo the last operation. Utilities->Undo Multiple is similar  but open a window in which  the operations to be undone can be selected.

¹ The GiD Toolbar is a window containing the icons for the most frequently executed operations. For information on a particular tool, click on the corresponding icon with the right mouse button.

² The coordinates of a point may be entered on the command line, not enclosed in parentheses, either with a space or a comma between them. If the Z coordinate is not entered, it is considered 0 by default. After entering the numbers, press Return. Another option for entering a point is using the Coordinates window, found in Utilities->Tools->Coordinates window.

³ Pressing the ESC key is equivalent to pressing the center mouse button.