xev(1) on Linux
The text 2c8ff89859ac, as Debian 12 (Bookworm), Debian 11 (Bullseye) shipped it.
print contents of X events
Flags it lists
-
-bs -
-bw -
-display -
-event -
-geometry -
-id -
-name -
-root -
-rv -
-s -
-version