The help page gives this: +To mark up text:+ +Click Annotate in the toolbar, if there are no buttons at the bottom of the window.+ +Click the type of markup at the bottom of the window.+ +Highlight: Changes the background color of the selected text.+
+Strikethrough: Puts a line through the middle of the selected text.+
+Underline: Puts a line under the selected text.+
+To choose the color of the markup, use the Color pop-up menu at the bottom of the window.+ +Select the text you want to mark up.+
When I click on Annotate, and then click the highlight button at bottom of the window, there's no way to select text. All I get is the standard cursor arrow. If I select text using the select tool and then click on the highlight button, the selected window goes away and nothing happens.
Thanks for that response. The note to make sure it was a "text" pdf is the difference. I use a Fuji ScanSnap and the default application is Preview. I had to use Adobe to OCR the document. Once that is done, then highlighting in Preview works fine.