How to show clipping in Lightroom Mobile on Android with Samsung Dex

When using Lightroom Mobile on Android, does anyone know how to show clipping when changing exposure, whites, or blacks when running the app on Samsung Dex?

When running on just the Android device you use two fingers when moving the slider to show the clipping. When running under Samsung Dex you would use the mouse to move the slider. I've tried using the right (secondary) button to move the slider as well as holding down ctrl, fn, or alt on the keyboard and nothing seems to work.

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