You can easily highlight, underline, and cross out text in a document in Adobe Acrobat Creative Suite 5 by using the Highlight Text Tool in the Comment & Markup toolbar, which you can access by clicking the Comment option in the Tasks toolbar. You can then choose Show the Comment & Markup Tools.

You can also access the Comment & Markup toolbar by choosing View→ Toolbars→Comment & Markup.

The Comment & Markup toolbar in Acrobat Creative Suite 5.

The Highlight Text, Cross Out Text, and Underline Text tools provide the same functionality and options that are available with the Text Edits tool, but with easier access. If you want to delete the highlighted, crossed-out, or underlined formatting to your text, just click the formatted area and hit the Delete or Backspace key. Your text will remain, but the formatting will disappear.

To highlight text, follow these steps:

1. Select the Highlight Text tool from the Comment & Markup toolbar.

2. Drag over the text that you want highlighted.

The text is now highlighted.

To underline text, follow these steps:

1. Select the Underline Text tool by selecting Tools→Comment & Markup Tools→Underline Text.

2. Drag over the text that you want underlined.

The text is now underlined.

To cross out text, follow these steps:

1. Select the Cross Out Text tool by choosing Tools→Comment & Markup Tools→Cross Out Text Tool.

2. Drag over the text that you want crossed out.

The text is now crossed out.