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.
This action splits the UI into two sections,
and adds a tree view of the FBX options in the left section.
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.