You can input text names in the same way as numbers, but you only need to click a name field once to allow input. You can directly click a region (or Mixer channel strip) with the Text tool to rename it.
Any number of selected objects (such as regions) can be assigned the same name. If the name ends with a number, this number is automatically incremented by 1 for each subsequent object. This allows you to quickly, and uniquely, name all of the regions on a track, for example.
Note: To turn off automatic numbering, place a space after the number at the end of the name you type in. All selected objects will then end with the same number. This may be useful for identifying all main vocal regions recorded in another session, for example (rename to “mainvox 030707,” followed by the space, to identify the regions by date).