Bug: Prism displays X values instead of row titles next to data points.

In the Format Graph dialog check "Label each point with its row title" to put row titles next to each point on the graph. You can then move those titles individually to avoid overlap. 

Prism 5 Mac (up to 5.0f), has an annoying bug: Sometimes Prism displays the X values instead of displaying the row titles. 

To avoid this problem: Enter the Y (and X) values first, before entering any row titles. Yes, it sounds strange, but if you enter the row titles first, Prism gets confused. 

To fix this problem once it has occurred: From the data table, click New, then Duplicate Sheet. The newly created copy of the graph will show row titles as it should (not X values). 

This problem does not occur in Prism 6, and will not be fixed in Prism 5 (since it was discovered one year after release of Prism 6).