Restoring mouse roller buttom zoom function

Hi, not a highly technical question, but i’ve somehow disabled the roller button zoom function on the mouse. Any ideas how to restore it?

Saved the drawing and logged off Rhino. Restarted and the zoom function has returned to the roller button on the mouse. However while holding down right click used to allow me to grab and move the drawing it now spins the drawing in a round the world style perspective view.

Any ideas how i get my grab back?

You mean you want to pan around the model? Shift+Rclick
Pretty sure the default for the Right mouse button is to orbit. Something seems different for you.

the right mouse button is standard for orbiting the model…

if you want to grab&move (drag) geometry, use the left mouse button… (click and hold for a split second then drag)