To Rename a Named Plot Style

Click Application menu Print Manage Plot Styles. Find
Double-click the STB file that contains the plot style you want to rename.
In the Plot Style Table Editor, Form View tab, right-click the plot style whose name you want to change.
Click Rename.
Enter the new name for the plot style.
Click Save & Close.

Note: You cannot rename the NORMAL style. You cannot rename plot styles in a color-dependent plot style table.