Problem:  In the chart legend, I want to change the names.  How do I do this?

These descriptions are the category names from the Event Entry tab's  Category column.   

Exception: If no category has been given for an event, it will be given an "Unassigned" category in the legend.

Solution: Go to the Event List area to change the name of the category.  Click in the Category cell to see the existing categories or click Edit Categories to make changes.  Your legend will show the changes. 

Timeline Maker Pro v3:  Click View, Edit Categories. or 

in Timeline Maker Professional (version 2.x)   Clik Edit, Categores.