From the HX Effects owner's manual ver 3.0
3.
Press the footswitch displaying the parameter you want to adjust.
Press and hold a Time or Speed switch to toggle between setting the value in ms or Hz and note divisions (1/4-note, dotted 1/8-note, etc.).
Press and hold any other parameter switch to reset its value to default.
4.
Use a connected expression pedal to adjust the parameter’s value.
For fine adjustment, press FS5 (VALUE–) and FS6 (VALUE+). Hold FS5 (VALUE–) or FS6 (VALUE+) for faster adjustments.
5.
When finished, press MODE (EXIT).
If you want to save any changes made to the preset, hold MODE (EXIT) for two seconds.
But no button push, tap, touch etc. does anything.
Even after power cycle the block in edit mode is still in edit mode.
P.S. I own a Helix, HX Stomp and Helix Native. I purchased the HX Effects to fill in while mt Stomp is going in for USB port replacement.