Underline

Underline marks text with a line under it. When you save, it becomes a real PDF annotation you can toggle, delete, or flatten later.

How to do it

1. Choose Underline, from the toolbar or the Annotate tools.
2. Drag across the text you want to mark.
3. Pick a color if you want something other than the default black.
4. To remove one, double-click an underline you've added.

Or skip the tool: with the Select tool, select text, then right-click and choose Underline. Right-click an underline to Remove it.

What to know

• Underlines are held until you Save, then saved as PDF annotations.
• Print markup controls printing. Leave Print markup on to include saved underlines when printing, or turn it off before saving new underlines.
• Flatten markup makes it permanent. Use Flatten markup when you want underlines baked into the page.
• Prepare for Filing asks first. If saved RaioPDF markup is present, filing offers to flatten it or keep it live before continuing.
• It needs real text to grab onto. On a scanned page, run Make Searchable first so there's text to underline.
• Reorganizing pages clears unsaved underlines. If you rotate, delete, or reorder pages before saving, underlines you haven't saved are cleared — save first.