For future reference, some keyboard shortcuts I keep forgetting:
- Ctrl-F2 jumps focus to the menu bar
- Ctrl-F3 jumps focus to the Dock
- Tab and Shift-Tab jump around buttons in modal dialogs, Space selects (not Enter, which triggers the default button (i.e. the one in blue)
(The last of these need the System Preferences/Keyboard & Mouse/Keyboard Shortcuts/Turn on full keyboard access option to be turned on).