Posted by dellus on Dec 31, 2024; 11:21am
URL: https://forum.librecad.org/Multi-select-for-Properties-tp5725918p5725920.html

"Attributes" is the tool for this. Tools - Modify - Attributes.
Select the entities first, also by window, then activate the command, or trigger the command first and then select the entities and close theselection with "Enter".

A circle normally is a single entity. If it is made up of a multitude of individual lines the drawing probably is from a different source. Maybe a vectorized scan?