CTRL Shift RMB changes viewport

I use CTRL SHIFT selection a lot, especially when editing SubDs and I love it.

However, when in an ortho viewport, I occasionally use the RMB expecting to zoom in/out while still having CTR & SHIFT held down and - Wooohoo! - the viewport changes to a perspective view.

OK, this is my fault for not releasing my creaky old fingers off the Shift key, but is there a setting somewhere that disables this “feature”?

While on the subject of CTRL SHIFT selection; Is there anyway to use lasso selection while doing CTRL SHIFT selections? That would be very helpful.

Cheers, Steve

Not sure my advise will be usefull but i make short cut fof front, right, left perspective set view on keyboard f5 f6 f7 f8, and when i miss click i just press f5 and top view fixed