+Ehab Bandar +Jason Gudmundson
Not sure exactly what you mean by 'merge circles'. Off-hand, I can think of three variations. I can't say the solutions are 'easy' and there's always the matter of keeping score in your head (much as in the RW !), but each type of merge can be handled in less than 1 minute and with just a few clicks:
A. If you want to take all members of one circle and add them to another, navigate to the appropriate ("source") circle and use the "View All" command...it's in the "More Options" menu, at right. Then, it's a simple matter to drag and drop them into the second ("destination") circle. The result is that all members of the source circle will now also
be members of the destination circle.
B. If, instead, you want to end up with only a single (destination) circle, simply delete the source circle after completing the drag-&-drop operation.
C. To get the same results as in case A, but only temporarily -- ie: you'd like to undo the merge, at some later time -- then I'd suggest creating a third circle. In two operations, drag all members of circles #1 and #2 then drop them into circle #3. When you wish to undo this merge, you can delete that circle...or simply ignore it until you need it again.
Hope this helps.