The new “AB Bypass” mode is related to how Program Bypass works. This is for specific setups where you’d like to keep the inserts active when the Program is bypassed. It’s not clear if you need this setting for your setup.
You can Bypass either Preset A or Preset B by using Perform Mode. Click the A or B LED to assign a function to that footswitch. You can also map either Preset A or Preset B bypass to a HotSwitch if you like. https://cdn.eventideaudio.com/manuals/h90/1.7.5/content/play-modes/perform.html
If you make edits to any parameters, you can save the Program, and that will save the settings of both Presets.
If you’d like to only save the Preset, click the 3-dot icon and select “Save to Library”. Please view #12 in the user manual here: https://cdn.eventideaudio.com/manuals/h90/1.7.5/content/h90-control/edit.html#parameters-edit-menu
You cannot have duplicate presets, it will prompt you to overwrite the preset if you save a preset using the same name.
