Active Stylus what do the buttons do?

[potatosubwoofer]

System: Win10
Battery or AC: Both
Model: Zenbook Duo 2021 UX483EG
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Detailed description：

The Active Stylus that came with the Zenbook Duo 2021, what do the two buttons do when using Windows? Have I not connected it correctly or something?
One buttton makes a circle appear around where the tip is but it doesn't actually do anything. Would it be possible to remap these for basic desktop functions such as left click, right click, scroll up/down and/or middle mouse click? This would be nicer than using the tap and hold feature.

[potatosubwoofer]

Ok so I have just found out that the top button is a right click when you tap. But the question still remains, what is the bottom button for?

[FongPoui]

@potatosubwoofer
Here is a youtube link for how to to use Asus pen. The lower button can do erasing task.
https://www.youtube.com/watch?v=f3B39SrIyB4

[potatosubwoofer]

Thanks, but can the lower button do anything in regular desktop mode?

[potatosubwoofer]

FongPoui

@potatosubwoofer

Here is a youtube link for how to to use Asus pen. The lower button can do erasing task.

https://www.youtube.com/watch?v=f3B39SrIyB4

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Also just for clarity, this video refers to the newer pen and not the one that was shipped with the 2021 model Zenbook Duos.