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Unfortunately sometimes (not always) the Select tool that lets you select text with the keyboard may vanish or turn into the Hand tool. In other words, to highlight text using only the keyboard in a PDF: select text with the keyboard, press the context menu key or Shift+F10, then press h, and voila! This brings up a context menu which, aha, allows you to highlight the pre-selected text with the h key.
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I tried selecting text first with the keyboard (using the Select Tool and the usual Shift keyboard shortcuts), then clicking on the Highlight Text tool, but that didn't work to highlight the selected text. I don't want to highlight text with the mouse, I want to select text with the keyboard, then use a keyboard shortcut or hotkey to highlight the selected text.
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In Adobe Acrobat 8 Professional and other versions of Acrobat, you can highlight text using the Highlight Text tool by selecting the tool, then dragging the cursor over the desired text using the mouse. This post shows how to highlight selected text in Adobe Acrobat using just the keyboard, after you select text with the keyboard.
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