When an enabled Figure Dimension has a label that is missing a file, you will see an "X" instead of a plot in that spot within the Illustration. For example, if you have enabled the Timepoints Figure Dimension and defined timepoint labels "0 minutes," "3 minutes," and "5 minutes" but there is no file assigned to the "3 minutes" timepoint label, you will see an "X" in place of the plot that should appear in the Illustration under the "3 minutes" heading. If you are working with multiple stimulation Conditions or multiple Individuals, make sure all "3 minute" files for all stimulation Conditions and all Individuals have been assigned to the "3 minutes" Timepoints label.
