having rapidly got into habit of panning using the scroll wheel, I discovered that +option it also zooms (but in steps); nevertheless very fast so bye bye/birds eye, or at least minimise for more room for main pallette except when exact zoom needed.

Also when cropping, option key toggles thirds lines. I wonder how many more shortcuts there are than list in appendix?

BTW the browser version of the manual accessed from help menu is ever so much easier to get about and read than pdf version, though the content is the same