Version 3.9
SyncEffects Keyword
To get the SyncEffects keyword in the command line, press and hold 
+ Effects (= SyncEffects).
You can also type SyncEffects in the command line or use the shortcut Sy.
Description
The SyncEffects keyword starts all running effects synchronous.
Hint:
You can also use the Sync Effects button in the Special Dialog I Effect Value.
You can also use the Sync Effects button in the Special Dialog I Effect Value.
Syntax
SyncEffects
Example
Synchronize the PWM (= Pulse-width modulation) effect for the selected fixtures.
[Channel]> SyncEffects