What is ⌘ Cmd + ⌥ Opt + = keyboard shortcut for?

Popular programs using this shortcut

What this shortcut does in different programs?

1. DaVinci Resolve 15 (Mac) - Increase audio level 1db  
2. Xcode - Zoom in when screen zooming is on  
3. Google Sheets (Mac) - (with cells selected) Open insert menu  
4. BBEdit 13 - Replace all  
5. Luna (DAW) - Increment Nudge Value  

All programs

All programs using this shortcut, by category.

Note: This page includes variations for Command + Option + =
Option + Command + =
Command + Option + =. Restrict to only Command + Option + =.