Posted by Land Owner on Feb 27, 2021; 12:10pm
URL: https://forum.librecad.org/Reference-Scale-tp5720065p5720277.html

A little late to the party.  As a Civil Engineer, I am used to scaling up/down as elements outside of the building envelope may require.  I measure an element in the drawing (say - a line, maybe a property line - or the width of a desk or interior wall if inside the building envelope), one that is long, and one that has a known dimension.  If the element measured is too long (say), I divide the smaller known dimension by the larger measured dimension to establish the percentage of scale reduction required.  Then I command:

SCALE==>(Select to scale)
SELECT ALL [button]==>
right click again in the drawing==>
SCALE==>(Select reference point)
0,0 [or other appropriate reference point]==>
[load the calculated percentage into the ISOTROPIC SCALE menu]==>
<ENTER>

Save Early - Save Often, in particular immediately prior to SCALE.  

Warning:  Some blocks do not react well to scaling; dimension arrowhead blocks from AutoCAD in particular.  

UNDO (after SCALE) doesn't get it done for me.  Is there a presetting for the amount of allowable buffer?

When a commands "blow up" unexpectedly (I am new to LibreCAD), I close and reload the drawing, then try something else.