Explicit Indication of FTS
 

By opening any URD, you won't know if it's a FTS-based URD. Of course, it'll require a several steps to find it out. Does it make any difference? Definitely. Info items and/or folders are not transferable between FTS and non-FTS based URDs.

Armstrong

Tools | Compact & Repair -> if 'Enable full-text search enhancements' is checked, FTS is enabled. Or Help | About | Install Info -> Data version: 4.0.0 [FTS].

Hi Kinook,

As you can see, it takes several steps to find it out.
Would it be nice, just like [stored] info items, a [FTS] is shown adjacent to the URD name at the window title? So you can differentiate FTS and non-FTS URD at a glance.

Armstrong

You can assign a keyboard shortcut to Tools | Compact & Repair (Tools | Customize | Keyboard) and see it in one keystroke, then press Esc to cancel.

Sorry for my senior moment. Yes, your solution can save time to look up the FTS status. Thanks.
Armstrong