Tip 2: Expand Your Panels
To see more gridlines when you’re working in Curves, Ctrl + click on the Curves background.
(Click for Full-Res)
Make the panels and the information they contain easier to see, too. Start with the layer thumbnails. Right-click on the empty gray part of the Layers Panel to see a menu, and choose Large Thumbnails. The Adjustments panel is small by default, but you can enlarge that as well. Click the flyout menu in the top-right corner of the panel, and choose Expanded View. Do the same for the histogram to make it bigger.