How to zoom via the app with a mavic mini 2

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Using the search function on this forum (magnifying glass upper-right corner), I came across this post from @wesbarris:

Camera Zoom while in manual flight

From the manual: Camera Zoom Optical/Digital zoom: For cameras which support optical or digital zoom but cannot be adjusted using the RC’s right wheel: hold the RC’s Fn/C2 button and use the left RC wheel to adjust the zoom. Custom Function: It is also possible to control the zoom (optical or digital) using the custom functions “Zoom In” and “Zoom Out”. Only for cameras which support zoom in the DJI firmware.