Highlight an area instead of just highlighting text?

In a document with text, I need more flexibility with what I can highlight in Adobe Acrobat than what the Highlight tool provides because the Highlight tool only highlights text strings instead of allowing me to highlight an entire area of a document. I know that I can use the rectangle tool and adjust the opacity to be able to see the text underneath, but this is not a good solution because it dims the color of the rectangle fill. I want the bold color that the Highlight tool provides but with the flexibility of the Draw Rectangle tool. Is there a way to do that?