SATB in musescore 4

I am editing an earlier arrangement i did in musescore 4 and now i need to cut down on the space.

I have some parts of the piece wich is in unison an i would like to merge the current 4 SATB staves into 2 S/A and T/B.
i never learned this in musescore 3 is there a way for me to do this in musescore 4

we are talking 8 bars but it would really help the amount of pages