when I middle click the mouse for adjusting the brush size and strength, sometimes it works fine, but most of the time, it switch the viewport, such as when I middle click the mouse when I am in the perspective view only, it opens up all 4 views, and when I middle click again, it switch to another view depends on where my mouse pointer view is. Is this a bug of C4D or how to work around it to use the middle mouse to adjust the brush size and strength properly? I am using R18 studio version or C4D.
Thanks,