iSpring is a site that gives the best alternative for this problem. I want to do the same thing but I think it's not possible So you will try this. and if you find a more efficient way please guide me.
Moderator: this is a promotion comment which has nothing to do with the question. iSpring is a PPT plugin, not from Adobe but can be compared with Adobe Presenter and Articulate Presenter, but not with a full-features authoring tool like Adobe Captivate, Lectora and StoryLine.
To the OP: please do not be confused. Can you please mention the full version number you are using at this moment, as found under Help, About Captivate