Add a button/card that opens a textual document

Hi everyone

I would like to know if in PowerBI there is the possibility to add a button/card/whatever that shows a simple message like "click here for further information" and then when you click it it goes into a kind of focus mode or opens a popup that shows some text. The reason I need this is that I have a report with different pages and each page has different combinations of filters, and I would like my user to be able to easily see what kind of filters I have applied (and the reason why we applied that filter) with a textual explanation. However, putting a text box in each page would cover up too much space in the page, so I need some kind of button or box that only opens up the textual document when you click on it

I don't even know if it's possible to do something like this but maybe someone has had a similar requirement and has a solution. 

Thanks!