Posted by John_T on
URL: https://forum.librecad.org/Set-Relative-Zero-Position-command-behavior-change-tp5714572p5726970.html

I'm replying to this old thread as it was relevant to me, and I thought some extra information that might be useful to others as well as improving search results.

Using the "rz" command from the command dialog allows you to change the relative zero and then continue with whatever you were doing previously, unlike clicking on the "set relative zero" button on the menu.

This is useful for a number of reasons. A simple example is described below, drawing a line with two points, where I want each end of the line to be offset from some other existing feature.

1. Set the relative zero point to the first feature of interest. (either way is OK in this case)
2. Select line using two points
3. Enter @100,200 in the command dialog (or whatever offset you need)
4. When prompted for the second point, enter "rz" in the command dialog box
5. Set the relative zero point by clicking on the second feature of interest
6. Enter @50,100 in the command dialog (or whatever offset you need)
You are done, you have your line using two different offset values. It's not terribly complicated, but I had kept stumbling at step 4 expecting the toolbar click to behave the same as the manual command.