you should be able to open the context menu of an item from your keyboard. In Windows and linux, the right system key (to the right of AltGr) does that. I would imagine in Mac the right option key would? you can then scroll to view pdf.
We should probably make Return/Enter on the attachment do this. There's not really an easy way to do this on a Mac. (I think you have to either use Mouse Keys or a third-party program.)
We could also conceivably override the expand action on the parent, since it's a duplicate of right-arrow.
Hi. Is 'Enter' to open an attachment still being considered? I'm very fond of expanding items with the arrow keys, and Enter to open the pdf seems natural to me. I use the standalone, so I only have my default viewer as an option: is the browser/external viewer decision maybe forestalling this implementation?
You could probably accomplish this already by using ZoteroQuickLook and configuring your default PDF reader as the quicklook command. ( I assume that this is the third party software that Dan is referring to)
you can then scroll to view pdf.
We could also conceivably override the expand action on the parent, since it's a duplicate of right-arrow.