You can modify existing presets with custom option settings and UI layouts using the Edit preset mode.

1. Click Edit > Edit preset.
2. A dialog box opens to inform you that you must right-click a tree view item to edit its parameters. Click Ok.
   
3. This action splits the UI into two sections, and adds a tree view of the FBX options in the left section.
   
4. Right-click elements in the Tree View to access the Edit options.
   
   Note

   Some edit options are common to all structure levels, while some are specific to a particular structure level. You can apply some options at any level of the options structure. See Edit mode options.