Posted by dellus on Feb 24, 2021; 12:12pm
URL: https://forum.librecad.org/Remove-the-empty-layers-tp5716976p5720267.html

You have to use LibreCAD 2.2.0 (the latest is rc2) to select more than one layer.
Available here https://sourceforge.net/projects/librecad/files/Windows/NightlyBuilds/master/LibreCAD-Installer-2.2.0-rc2-1-g6dfb387c.exe/download
or if you are still on XP https://sourceforge.net/projects/librecad/files/Windows/NightlyBuilds/master.xp/LibreCAD-XP-Installer-2.2.0-rc2-1-g6dfb387c.exe/download
You may also try the portable version https://portableapps.com/node/63458
You can test and use this while keeping your current installation.