It sounds like you are referring to the “Repeat” performance parameter of the Multitap algorithm. This can be a latching or momentary parameter.
The performance parameters can be accessed in Perform Mode. If the Multitap algorithm is being used for Preset A, you’ll have to press the A LED button to cycle through the performance parameters. This can also be selected from H90 Control by clicking the “Control Assignments” tab. You can map the function to your MIDI controller using the “Performance Parameter Mapping” window.