How to Use the Single Column and Single Row Marquee Tools in Photoshop CS6
In Adobe Photoshop Creative Suite 6, the Single Row and Single Column Marquee tools select a single row or single column of pixels.
If you don’t go blind using them, these tools can occasionally come in handy for selecting and repairing a thin scratch or fold line on an image, or for getting rid of an artifact, such as a colored line, that has somehow appeared on a scanned image. They are extremely handy in making repairs and are well worth the effort needed to master their use.
To use either of these tools, click either the row or column of pixels that you want to work on. You don’t have to do any dragging, but it does help to zoom into your image so that you can better position the tool on the offending row or column.
The Single Row and Single Column Marquee tools in Photoshop CS6 don’t have keyboard shortcuts, so you’re stuck with having to click the tools to select them, but the results are worth the extra effort to use them.