Reading a PDF file on Google Chrome on 2 columns

> Rotate your computer's screen 270° (from the computer settings "Display" menu) and then rotate the pdf 90° to the right (using the rotate button inside the pdf viewer, top right.) Use Ctrl & Shft & +/- to resize document to get 2 pages per screen. Rotate your keyboard 90° degrees to the left to use the arrow keys for document navigation.

> Brilliant! Who needs software? Here's an alternative: open Chrome, rotate your screen backwards by 90°, print out the pdf document in single-page mode (even and odd page numbers separately), arrange the two stacks on your flat computer screen. Adjust distance between eyes and paper to select a comfortable zoom setting. Turn off computer.