Posted by perepujal on Jan 15, 2021; 11:15pm
URL: https://forum.librecad.org/Reference-Scale-tp5720065p5720066.html

Assuming your default units already are in inches, otherwise change the drawing to the units you will be using before any measurement.

measure a line with known measures, If I understand correctly, you say countertop should be 24" but it currently measures 38"
select the entire drawing entities, then scale
select a base point anywhere it makes sense, it is not so important as you scale everything.
In the popup dialog set the scale to 24/measured_distance
done

HTH