Click the Line
command in the Geometry
menu or Design toolbar.
Complete the subsequent Line dialog. See the further
information below, and/or click the dialog's Help button for more information.
Note that you for some line type options in the dialog (for example
'Vertical'), you can just check the option and leave the rest of the settings
in their default condition. However this would be the equivalent of using
the Vertical Line command (for example), which it would be quicker to
use directly from the Design toolbar.
Follow the Status Bar prompts for completing the command. You might have to digitise the 'Point through which line will pass' for example.