I am still using Sketchup 2017 resident on my machine. I am a basic user and have a building layout. There has been many copies of this original file as we explore various options. Not sure if this has anything to do with my problem. At this point, if I zoom in to delete a line the design crashes, everything except text disappears and all text collapses on top of each other in one space. Basically, I can no longer edit this file. Any help is appreciated.
In there I have set the text to be a particular height (4 feet), I connected it to some geometry, and then in entity info there is an option to make the leader be Hidden. Doing those things will give you labels that stay where they should be, and they will scale as you zoom out.