A family of Microsoft presentation graphics products that offer tools for creating presentations and adding graphic effects like multimedia objects and special effects with text.
It would be convenient because I end up with too many open files at times. Thank you.
While Justin's correct, there's another trick that might help.
Start with one main presentation; it might be nothing more than a single slide listing each of the topics in your overall message.
Each of the topics (text box, shape, whatever) has a Hyperlink Action setting pointing to the presentation that covers that topic.
When clicked during a slide show, the topic presentation will open then quit when it gets to the end; or you can include an End Show action setting wherever you think you might want to end it yourself. Once the show ends, the presentation closes and leaves you back at the main presentation.
There will never be more than two presentations open and since one of them is a single slide, there's no strain on resources.