C-‹key› means press the Control key
M-‹key› (MacOS: [Esc] followed by but can also be set to [⌘]command or ALT ([⌥]option))
But these are not in the 'Show Keybindings' dialog;
The modifier identifiers are:
s: — All platforms: Shift
c: — All platforms: Control
a: — Mac OS: Option
m: — Windows: Alt; Unix: Meta; Mac OS: Command, when map-command-as-meta-key produces #t
d: — Mac OS: Command
l: — All platforms: Caps Lock
g: — Windows: Control plus Alt as AltGr; see get-control+meta-is-altgr in key-event%
?: — All platforms: allow match to character produced by opposite use of Shift, AltGr/Option, and/or Caps Lock, when available; see get-other-shift-key-code in key-event%
sequences ;
What dose the "~" (tilde) mean?
for example :
backward-word (~c:m:b)