The PDF equivalent of the navigation pane is the bookmark pane, which holds links that act as interactive index ... create the bookmark. Create additional bookmarks the same way. Click the "File ...

You can instead use a good cleaner like freeware CCleaner to remove the file. After you delete or erase the index.dat file, Internet Explorer will create a new empty index.dat file on reboot.

Spotlight, the automatic file index and search utility on your Mac, automatically indexes files on external drives for searching. When you connect an external hard drive to your computer ...