Reference

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wait

Built-in command

Arguments:

Description:

Wait for a given delay (in ms), optionally since the last call to wait.

or wait for a user event occurring on the selected instant display windows.
delay can be { <0=delay+flush events | 0=event | >0=delay }.
Command selection (if any) stands for instant display window indices instead of image indices.
If no window indices are specified and if delay is positive, the command results
in a hard sleep during specified delay.

Default values:

delay=0.