Select the Preferences…Indicators option from the File menu. Doing so will bring up the following dialog:

The three icons at the top let you indicate if you want the ShowShare icon to display at the left of the Apple menu icon in the menu bar, at the right of the application menu icon in the menu bar or in a small floating window you may position anywhere in the desktop area you wish.

The greyed-out section is for future expansion. Eventually, you'll be able to have more indicators shown in the floating window: AppleTalk Remote Access, AppleTalk on/off, Guest Access enabled, Owner Logged On, etc.