How to Modify Font Properties of the Text in a PDF. You can c# replace text in pdf this by using the paid version of Adobe Acrobat, or you can use an online service called PDFescape to white out and replace text if you don’t have the paid version of Adobe Acrobat.
Make sure that you have the paid version of Adobe Acrobat. The Adobe Acrobat Reader app that many people have can open PDFs, but not edit them. In order to edit PDFs, you must have Adobe Acrobat Pro. Open your PDF in Adobe Acrobat. If Adobe Acrobat is your computer’s default PDF reader, just double-click the PDF that you want to open.
It’s a tab in the upper-left side of the Adobe Acrobat window. This pink icon is near the top of the Tools tab. Doing so will open a sidebar to the right of the PDF. Find the text that you want to edit, then click and drag your mouse across the text to select it. Click the drop-down box below “FORMAT”, then click the font that you want to use. Click the drop-down box with a number in it, then click a larger or smaller number. You can also type in a number to create a custom size.