magit-section-backward-sibling ([) and magit-section-forward-sibling (]).

Line-wrap

$ is mapped to magit-process-buffer, so it’s hard to jump to end of line.

Use SPC t w to enable line wrapping.

Commit message

Finish or cancel editing

ActionKey
FinishC-c C-c, ZZ
CancelC-c C-k, ZQ

Commit message ring

Both finished and cancelled messages are saved to a ring that persists until Emacs is closed. Use M-p and M-n to navigate older messages in any edit session.