xprop(1) on Linux
The text 0d730c21fb05, as Debian 10 (Buster) shipped it.
property displayer for X
Flags it lists
-
-display -
-font -
-frame -
-fs -
-grammar -
-help -
-id -
-len -
-name -
-notype -
-remove -
-root -
-spy -
-verson