How to move the arrow in expression map?

Hi ! I know how to setup the expression map with key switch, and enter Latch mode lets me move the left green arrow in expression map setup (at the infos, in the left of the track), but how can I move the right green arrow?

For e.g., I’m using keyswitch at 2 different atticulations here, when I switch to channel 2, on the score,records channel 2 atticulation then suddenly it goes back to channel 1 atticulation, I think this is because of the right green arrow

The arrows on the left move as you play (and/or record) live, whereas the arrows on the right move on playback from the MIDI/Instrument track.