Single Row and Single Column Marquee Tools

The third and fourth choices under the Marquee tool pop-up menu are the Single Row and Single Column Marquee tools. These tools are limited in that they select only a one-pixel-tall row or one-pixel-wide column. To be honest, I rarely use them (maybe once or twice a year). However, they have gotten me out of few tight spots, such as when I had to clean up a few stray pixels from in between palettes when taking screen shots for this book.