I don't know what you consider easily but you tap the screen and then hit plus or minus. Every unit I've had has done that.
Well the 810 usually crashed when I did that.
Have found the 830 faultless though.
The 810 crashed when you did anything.
@chez_jay started
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I don't know what you consider easily but you tap the screen and then hit plus or minus. Every unit I've had has done that.