Is there a way to make pop-ups in ArcGIS Online floating or draggable?
In case of long text in pop-up, moving with a whole map is for map users impractical.
Geographic Information Systems Stack Exchange is a question and answer site for cartographers, geographers and GIS professionals. It only takes a minute to sign up.Sign up to join this community
Currently this is not possible in the map viewer. The 4.0 JS API has added the capability to dock your popups. Here is a link to a sample showing the popup docking. Just click the square box and it will dock it to the right corner.
Just to piggyback on the above answer, here is a forum post on how to do it in JS 4.x. It includes example code.