indesign to pdf : an interactive button not working

For the PDF, one option is to make the text frame a read-only text field with default text set to hidden. The button could show the field and to hide itself. Clicking another button or the text box itself could hide the text frame. Lock the document to keep the opening defaults intact.

Ik zie Nederlands in het voorbeeld, dus gok dat je zelf ook Nederlander bent.

jJe kunt op mijn blog zien hoe je dit doet (alweer een bercht van een aantal jaren terug!) xodat het ook werkt in een iPDF:

https://fvdgeest-dtp.blogspot.com/2012/10/interactieve-knoppen-in-pdf-zonder.html

the reason your button shows is not for the reason Derek described. its because your buttons are set up incorrectly, you need to make that button dissapear once clicked (it will have a show popup action and a hidde action), and for the popup, make the close button have two functions. make the popup dissapper, you did that. next make the button that make the popup up appear show.

You can have a word or words or an image (such as a button shape) as hyperlink in an Interactive PDF  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.

I'm not sure if in5 allows an Interactive PDF version to be produced - check with Ajar Productions.

Publish Online is HTML5 and can include interactivity, unlike PDF, which realistically is limited to simple hyperlinks.