Selection inside tmux or Emacs splits
In the Edit system menu, enable “Selection Respects Soft Boundaries.”
Recover deleted windows or splits
Press s-Z within a few seconds to get a closed window back.
Search
To fix a search highlight bug, go to advanced settings and turn off “Synchronize search queries across windows and applications”.
Copy Mode
To copy text from iTerm2 with keyboard only, press s-S-c to activate copy mode.
In copy mode, press v, V or C-v to toggle selection by character, line, or rectangle, similar to Vim’s Visual mode. hjkl and word-based movement keys are also supported.
To copy the selection, press y. To quit copy mode, press q.