In-page shortcuts
These fire on the page itself while the side panel is open: Alt+I toggles Inspect, Alt+C drops a comment pin, Alt+R starts a region comment (drag a rectangle), Alt+P pauses/resumes all motion on the page, and Alt+X copies the exported CSS to your clipboard.
Tabs & selection
Alt+1 / Alt+2 / Alt+3 jump to the Layers / Design / Changes tab. Escape deselects back to hover mode. Delete removes the selected element.
Undo & redo
Cmd/Ctrl + Z undoes the last style, text, or DOM change. Cmd/Ctrl + Shift + Z redoes it. Every change in the Changes tab is reversible individually too.
Browser-level commands
Alt+D opens Design Mode on both Chrome and Firefox; Alt+S takes a screenshot using the same target and destination as the camera button. They are browser commands rather than page handlers, so both can be rebound at chrome://extensions/shortcuts on Chrome or about:addons › Manage Extension Shortcuts on Firefox. Browsers treat the supplied keys as suggestions and may leave either command unassigned after an update or conflict. The 12 in-page shortcuts above cannot be remapped from Settings — that list is read-only.