First try using the text area for your message instead of the Subject line.
Open both your presentations in the slide sorter view, click on View, and
select arrange all, then either copy or move your slides from one
presentation to another.
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments. After that, you can post your question and our members will help you out.