Anytime you select text, it will highlight as long as the highlight mode is selected.If you want to change the color of the highlight, or strikethrough or underline it, click ( ) and select an option.Switch the highlight mode on or off by selecting ( ).You also can move the text box anywhere on the document.To change the font, size, or color, go to “View,” click on “Show Markup Toolbar,” and press A.Go to “Tools,” click on “Annotate,” select “Text,” and start typing.Place your cursor where you want to insert text.With Preview, you can highlight text, include a signature, or add text and comments. How to Edit a PDF on MacĪpple provides every Mac with Preview, a free program that allows you to view and edit a PDF and other file types. If you want to convert your form data into PDF files, use JotForm’s PDF Editor.