F3 (a fairly common NEXT) or enter jumps to next.
Shift-F3 (is the common Previous)
Esc cancels the search (returns to original location)
(Cancelling the search box seems to require the mouse use on the main viewer tool bar)
Preferences (
inside the Viewer): Keyboard shortcuts: is where you can reassign
some keystrokes
(note you have to click the Action on the list to see / change the assignments
)
Here is the Man page:
https://manual.calibre-ebook.com/vie...oard-shortcuts