After updating to the latest Rhino 9 Beta today, I noticed a change in the Middle Mouse Button (MMB) click behavior. Previously, the MMB pop-up menu would stay open so you could select an icon. Now, as soon as I release the mouse wheel button, it immediately executes a click action. While it is te…

RH-97126 is fixed in Rhino BETA

[image] JinYoung-Go: While it is technically possible to hold down the wheel button and release it over the desired icon, this feels different from the previous behavior and is a bit unnatural. I asked it to be fixed so that it works like that - which is the same way as V8 and previous versio…

[Rhino 9 Beta] MMB pop-up triggers on button release

Serengeti (Rhino BETA)

Gijs (Gijs de Zwart) July 22, 2026, 11:12am 3

RH-97126 Popup menu: vanishes when mousing out

Rhino BETA Feature: Updated Toolbars

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Bug: popup panel gets hidden as soon as wheel is not pressed anymore Serengeti (Rhino BETA) windows	2	64	July 28, 2026
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[Rhino 9 Beta] MMB pop-up triggers on button release

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