You can modify existing presets with custom
option settings and UI layouts using the Edit preset mode.
Click Edit > Edit preset.
A dialog box opens to inform you that
you must right-click a tree view item to edit its parameters. Click Ok.
The UI is split into two sections, adding
a tree view of the FBX options in the left section.
Select, and then right-click elements
in the Tree View to access the Edit options.
NoteSome 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.