What it says above. Alternately, a "Show currently researching" button, or panel, for all the things you have spent the Advancement points on.
#A "Show Currently Paused Research" button
merry hearth
hollow valley
Ah I see where these suggestions are coming from now. You play the game exactly as if you would an idler
merry hearth
Well, in this case, it's more a case of "I got distracted, come back, and forgot what I did a few minutes ago", particularly since I needed to do something else at the moment I paused research (or else I wouldn't have paused it).
modern vector
Or there is the case of when you needed to pause a research because you are running out of a particular resource.