This command is intended to be used in fvwm functions only. It causes execution of a function to pause until a new window matching window appears. This can be a window's name, class, or resource string. It may contain the wildcards '*' and '?', which are matched in the usual Unix filename manner. This is particularly useful in the "InitFunction" if you are trying to start windows on specific desktops:

AddToFunc InitFunction
 + I Exec exec xterm -geometry 80x64+0+0
 + I Wait xterm
 + I GotoDesk 0 2
 + I Exec exec xmh -font fixed -geometry \
       507x750+0+0
 + I Wait xmh
 + I GotoDesk 0 0

The above function starts an xterm on the current desk, waits for it to map itself, then switches to desk 2 and starts an xmh. After the xmh window appears control moves to desk 0.

Fvwm remains partially functional during a wait, but any input from the modules is queued up and processed only after the window appears or the command is aborted. For example, windows can not be focused with FvwmTaskBar or FvwmWinList during a wait.

You can escape from a Wait pause by pressing Ctrl-Alt-Escape (where Alt is the first modifier). To redefine this key sequence see the EscapeFunc command.