Probe Screen - Workflow

Hello everybody
I installed and configured Probe Screen V2 but I have troubles to have consistency when probing.
Can you please review my workflow and tell I'm doing right ?
* "Remap M6"/"Enable" is ticked.
* "Zero"/"Auto Zero" is ticked.
1) I mount a probe in the tool holder.
2) Hit the button "Remap M6"/"TS height" in PSV2. Wait for the sequence to compete. The value is updated in the "TS height" text field.
3) Jog above my stock.
4) Hit the button "Remap M6"/"Workpiece Height". Wait for the sequence to compete. The value is updated in the "Workpiece height" text field.
5) Hit the button "Measurement outside" / "Z-". Wait for the sequence to compete.
6) Jog to the corner of my stock.
7) Hit the button "Measurement outside"/"X+Y". Wait for the sequence to compete.
8) Load and run my G-Code program.
9) Spindle move to change tool position. Message prompt me to load the tool according to the G-Code.
10) I change tool and hit OK when done.
11) Tool height is automatically probed.
12) Spindle is started and milling starts.

Can you also explain what "Workpiece Height" is used for ?
Regards