The new interface have several places where some parts of the UI is hidden outside a UI frame, and you need to use the mouse wheel to scroll to show the UI (eg Preferences dialog), but there is now indicated anywhere that something is hidden, a scroll bar is a standard way to show this, but thats not even shown in the Topaz UI.
This is kinda ok’ish if you use a mouse with a scrollwheel because you can discover it by using the scrollwheel when hovering over the area. But when you use a Wacom as a input its not very nice to use.
Add middlebutton drag as a default to scroll anywhere in the app would be very nice, and a pretty standard practice in many applications, like Resolve and After Effects
….ok just discovered you can left click to drag the UI… trying to mimick a touch interface on a non-touch device. Just do this exact same behaviour with the middel button too 
