use M900 K0.010 in filament advanced Gcode to store settings
Put in developer mode. If it’s in developer mode take it out. It’s in preferences top left. Then it’ll show in printer extruder.
The Bamboo Slicer does not have the K-factor preserving feature for the filament like the Orca. In AMS version 1.7.4.52, some features such as slot editing may not be available. If you want to set your own K-factor value, you may want to contact the developers or look for alternative calibration methods. Perhaps running the Calibration from Device panel will help, but this may overwrite your settings.