Correct. The Bed Visualizer plugin just displays the leveling report provided by the firmware, does not send save commands or otherwise (unless you include it in the gcode script).
u got a "save mesh" checkbox in the plugin settings.
Good point. It does save settings, and when that option is enabled it saves the mesh to OctoPrint's config.yaml. What I meant to say is that is does not send any commands to your firmware to store EEPROM settings (ie M500).
ahh and that i was not sure about.
so this is my config and i have m500 m501 in it to be sure.
use M420 S1 in ur start code to enable and use the mesh ( or enable RESTORE_MESH_AFTER_G28 in ur firmware config )
use this to level once every few weeks or if i change sth
M190 S70 ;wait for bed temp M155 S30 ;lower temp report for better probing G28 ;home G29 T ;ABL and echo report M500 ;save new mesh M501 ;load new mesh M155 S3 ;set temp report back M140 S0 ;disable bed heating