Did you know? mapcomplete.org supports hotkeys. Our favourites are:

P (and shift+P) to select a Picture-based background, M (and Shift+M) for a map (not based on OSM), and O for an #OpenStreetMap based one. Backgrounds are curated by the editor layer index.

And of course, Ctrl+F selects the search bar. Btw, a big improvement to search is coming soon.

For more hotkeys, check the 'Hotkeys'-page in the menu