How to ser training zones (Z1..to...Z5) based on running pace

Hi!
i'd like to set the Z zones based on pace (for running) instead of BPM.
I did a lactate treshold test and, has an outcome, i'd like to set pace instead of bpm.
Right now, the only way possible i find is to set the lactate treshold and garmin automatically sets the zones with BPM intervals.

is there a way to make this based on pace?
Note: i know you cans set-up per train pace but i want it fixed.

thanks