ViTiny DiGi UM06 User Manual page 5

(4) Manual focus
：Zooms in; speed increases when held.
(4-1) Zoom in
：Zooms out; speed increases when held.
(4-2) Zoom out
：zoom in by steps.
(4-3) Step zoom in
：zoom out by steps.
(4-4) Step zoom out
Microscope remote controller Buttons for common use
3