content: Were all familiar with Adobe Reader for PDF files on larger screens and maybe you use it on your mobile device without a second thought. Do give it a second look. If you havent discovered Liquid Mode youre missing out. The teardrop icon at the top of the Acrobat Reader screen will reformat a fullwidth document to fit in your small screen with text at a legible size. Not all files work this way youll get an explanation if its a scanned image or a text file more than 200 pages long.