You can also add it to a dragable panel like the other widgets and you can register a callback method to be notified when the value of the slider has changed.

The addon can be downloaded for free from my github:
https://github.com/jayanam/bl_ui_widgets

Please let’s discuss if the widgets should use the coordinate system of the viewport (origin lower left hand corner) or like widgets usually have, a coordinate system with a top left hand origin.

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