If you've ever had an issue changing object properties from the ribbon, and you are working with a VERY large drawing - you've probably run into the 2500 object limit set by the AutoCAD Gods. 2500 objects selected? No problem. 2501 objects selected? Then everything goes to hell in a hand basket (and whoever came up with that phrase anyway? Who goes to hell holding a hand basket?
But I digress...
The brilliant Dieter Schlaepfer (whom I worked with many years ago when I first joined Autodesk) is a member of the AutoCAD Learning Experience team. Dieter came up with a means of surpassing the 2500 object limit by setting the RIBBONCONTEXTSELLIM system variable.This (painfully hard to remember) system variable can be set as high as 32767.
Note: For performance reasons, the number of objects that can be changed at one time from the ribbon property controls is limited to 2500 by default.
If you're running into object limits with the standard Properties or Quick Properties command - take a look at the PROPOBJLIMIT system variable. Same default, same limits apply here.
So go off and increase your object properties limits! Just go crazy! (You wild and crazy CAD users...)