How to stack some data sets, but group or interleave others, in grouped bar graphs.

Prism lets you customize bar graphs, to combine interleaving and stacking.

To make this kind of graph:

1. Enter data on a Grouped data table.
2. Choose a bar graph that is entirely stacked.
3. From the stacked graph, double click to go to the Format Graph dialog.
4. Go to the second, Data Sets on Graph, tab. 
5. Click through the data sets one at a time. There is no choice for the first data set. For the others, you can choose (bottom of dialog) whether you want that data set to be stacked on top of the prior data set, interleaved or grouped. For the example above, the third data set is interleaved with the second. The second and fourth data sets are stacked on the previous data set. 

Download the Prism file.  This file was created with Prism 6, but should work fine with Prism 5.