Effects can be bypassed (signals are then directly sent without any effect being applied). You can turn on/off an effect by clicking on it while pressing the Ctrl key.
Even if an effect is bypassed, the memory buffers allocated for its processing are not released.
It is also possible to bypass an effect programmatically.

Note: A common value is used for all Snapshot for the bypass state of the effects.
It is not possible to memorize the state of the bypass independently for each snapshot.