Posted by dellus on Dec 28, 2020; 12:06pm
URL: https://forum.librecad.org/Drawing-dimensioned-objects-tp5719935p5719937.html

You can't change "listed dimensions" of a rectangle afterwards. I know, in other CADs you can, but not in LC. For some entities you can edit some values via Properties, but not for a rectangle.
Determining the dimensions of a rectangle by view, watching the coordinates, is not a recommendable way. Too fuzzy. You might use Snap to Grid, better, but still you can't get any desired value.
Best determine the values by input to the command line while drawing.
Please look at the manual how to do it, not everyone can be given an individual lesson.
https://librecad.readthedocs.io/en/latest/index.html

You can't set the grid to a certain sheet size. It is recommendable to draw a rectangle in that size. If you intend a scaled drawing then draw the rectangle accordingly x-times larger. Then do an Auto Zoom, and you will have your sheet approximately filling the screen.