Adobe Acrobat 7 Professional - Manual (Page 23)

If you want to set tool and object properties
You can customize many settings in Acrobat by choosing Edit > Preferences (Windows)
or Acrobat > Preferences (Mac OS). For setting properties of some tools and other objects,
you can use the Properties Bar. For example, while adding note comments to a PDF
document, you may want the Note tool to remain selected. To do this, select the Keep
Tool Selected option on the Note Tool Properties toolbar. (If the Properties toolbar isn't
visible, choose View > Toolbars > Properties Bar.) (See
Setting Commenting preferences
and Changing the appearance of comments .)
Some tools, such as the Measuring tools, also have a Properties dialog box that opens
automatically when you select the tool.