You’re looking for a drop down menu (●●●) with Save to Library under its selections.  #12 in this image …

https://cdn.eventideaudio.com/manuals/h90/1.11.4/_images/h90control_parameters.png

… or above #3 in this image:

https://cdn.eventideaudio.com/manuals/h90/1.11.4/_images/h90control_presets.png