Ok, so everyone probably already knows this one. Still, it’s almost as invaluable as Continuous Grab to me. When hovering the mouse over any value, colour or text field, just hit Ctrl+C to copy the value and then Ctrl+V when hovering over another field to paste it there.
One could argue about how Blender is missing all sorts of industry standard features like particle meshing and alembic cache support, but honestly these tiny usability features are what I love most about Blender (apart from the great community of course ;) ). Though that’s not to say I wouldn’t like to have particle meshing and alembic cache support ;)
I only learned about this feature maybe last week(a comment on a tutorial that had viewers selecting & copying the hex code), and even then the tip in the comment was for colors, not ANY value. I just now tested it, and it even works if you hold down ctrl+v as you drag your mouse over several values! I also found that it copies it in plain text to the system’s clipboard, and copying white from a color box will paste as “[1.000000, 1.000000, 1.000000, 1.000000]”, last color being alpha.
This is an awesome usability feature!