Assuming you're producing an Interactive PDF document, you can have a word or words or an image (such as a button shape) as a document hyperlink to say another page in the document, or to an external website. Some devices, for example, iPads, don't have rollover capability – only click – you should avoid multi-action buttons like On Click, On Roll Over, etc. Multi-state object (MSO) don’t work at all in an Interactive PDFs.
Thanks Derek. Yes, I want to produce an interactive PDF. On the pic below, in each empty "Q" field, I want the user to be able to click once for a green circle to appear, click once more for it to change to an orange circle, then click again for it to change to a red circle. Ideally, I'd like them to be able to continue clicking for each consecutive colour incase they make a mistake.
I don't need them to link to anything, they're only used as a reference to the progress key There would be no rollovers, only clicks.
Plus, I'd need the pdf to retain the selections once saved and reopened.