zoom in onshape

Hello. During the last few days, I have noticed an annoying behavior in assemblies where sometimes the view zooms out and the assembly gets centered, as though I pressed the "F" key, after I zoom and then pan. This seems to happen at random, always after zooming and panning using my mouse. I have not noticed this behavior…

Is there a way to adjust the extent to which you zoom in or out on a laptop without a mouse or touchscreen? The problem with zoom to selection is that it is often difficult to select the appropriate part to zoom in and it does not zoom in to the right extent.