How to change frame during an in-frame animation?

Hi there,

I have to implement a checklist in my Prezi.
After I cleared a point I want to make a check mark after it.
So I have several points with check marks.
Well, to explain the points, I have to switch between the frames and come back to the "main frame" with the check marks afterwards.
But, how is it possible to speak e.g. about two points, put in the checkmarks (with the animation tool), than change to another frame, come back and set the thrid checkmark?
The problem is, that I have to "hide" one checkmark, because I wont anticipate the result, before I have explained the point on another frame.
For some reasons, I only can do the "main frame" without an animations, so I have all checkmarks on the sheet, or I can animate them one after another, but without changing the frame druing the animation.
Is this somehow possible?

Thank you!