S1 breaks the Macintosh OS interface by not allowing the following:
"Command–Grave accent (`): Switch between the windows of the app you're using. (The character on the second key varies by keyboard. It's generally the key above the Tab key and to the left of the number 1.)" --
https://support.apple.com/en-us/HT201236
When implemented in S1, a user could quickly and easily switch between a plugin wind, the song window, etc. in the current active monitor (for those with more than one monitor).
This feature is in all Mac programs, but not yours. We'd love it!