Onyx Boox Poke5P User Manual page 17

Others
Stay active in the background
This is for the apps that are
continuously running in the
background, such as Alarms,
Notifications, Download. You can
stop the apps running.
Force follow system direction
Some APPs lock the direction. When the system rotates, if
the APP cannot follow the rotation, forced rotation can be
used;
Forced rotation may cause some interfaces to fail to display
normally. For such APP, it is recommended to turn off
forced rotation and use the original direction;