This macro iterates all indexes in a model and renames them to EntityName<number>_fb_i.

1. Download and install the package to Toad Data Modeler.

How to import custom packages

2. Click Macros | Rename Indexes

 

The macro changes names of function based indexes (Indexes where option Generate Expression is enabled).

 

3. To modify the code, open Package Explorer and edit code of the RenameIndexes macro.