Hi Steve, you can do this in the slideshow module. There are a number of options under the ABC button including title and caption together with custom text. Click the pull-down menu icon to the left of the custom text box that appears when clicking ABC.
Each field gets its own text box which can be anchored to any part of the image. The corner handles can also be dragged to resize.
I’m not sure if this will meet your needs but there is an option to export to PDF which could possibly be used for printing. Click image below to enlarge.