This plugins was made to make easier to add fingering to brass instruments in Musescore 3 and 4. It supports trumpets in C and Bb, trombone, tuba and euphonium. It's also possible to add fingering for other instruments by using the Note shift option, that allows you to shift the fingering to any tone in the scale.
When the Auto option is selected the plugin will try to add fingering to all the staffs, based on the instrument name. When Auto is checked the Clean fingering button will also act in all staffs.
The Break line option makes the plugin add the fingering numbers one per line for trumpet, tuba and euphonium. When not selected the numbers will be placed side by side.