Custom chart types are stored as individual chart sheets in Xl8galry.xls(for built-in custom
chart types) and
Xlusrgal.xls(for user-defined chart types). Use the following techniques
to manage the contents of the chart gallery:
■To rename or delete one or more chart types from the built-in gallery, open
Xl8galry.xls, right-click the sheet you want to delete, and then click Rename or
Delete.
■To add a new chart type to the built-in gallery, first save the new chart type in the user-
defined gallery, being sure to give it a name and description. Then open
Xl8galry.xls
and Xlusrgal.xlsand copy the chart tab ...
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