How to change Android system boot slot form A to B

How To Port TWRP To AB Partitioned Devices Running Android 10 twrp slot a slot b Boot TWRP in slot a; Install LineageOS , TWRP will install it to slot b! Flash to slot b 888 slot casino Thread AB slot issue, TWRP only on one unrooted rom on other Can't mount from TWRP TWRP is on slot B but not slot A I can only reboot to system from TWRP

forge of wealth slot Hello,I've successfully installed twrp and rooted via experimenting with TWRP, I tried booting from the 'B' slot Failure, stuck in fastboot