I am using omni focus for the first time. I tried looking at the manual and couldn’t find anywhere how to use the line tool without connecting objects. I wan’t to use the line tool then click on one side of the canvas to another and that be it for the line. After I click on the other side of the canvas the line tool displays as a plus and wants me to place the line somewhere else resulting in an unending line. I just want a simple line. How???
I assume you are talking about Omnigraffle, not Omnifocus. Try double-clicking instead of just clicking at the end of the line.
You can press Return instead of double clicking to end a line if you prefer.