Acrobat 9 - How to highlight portions of an image?

[nashville_rookie]

As my screen name suggests, I am not well versed in Acrobat 9.  I am attempting to highlight areas of an application that we send out to our students.  Apparantly the portion of the application in the PDF that I am attempting to highlight is part of an image and not text.  Other text portions of the PDF can be highlighted with the highlighting tool, just not the image.  Does anyone have any ideas?  Thanks in advance for your help!

[Bernd Alheit · Accepted solution]

You can try one of the tools, like Rectangle Tool, Polygon Tool.

[nashville_rookie]

The Rectangle Tool did the trick!  Thanks Bernd!