Convert Images from RGB to Grayscale in Photoshop Elements 10
You don’t have to give up your color data when converting images to grayscale. Using the Image→Mode→Grayscale menu command removes all the color from the pixels. As an alternative for converting images to grayscale, open an RGB image in Photoshop Elements 10 and follow these steps:
1Duplicate a layer.
The default Panels Bin contains the Layers panel. In this panel, you find a pop-up menu when you click the icon in the upper-right corner. From the menu commands, choose Duplicate Layer.
You can also duplicate a layer by dragging the layer name to the New Layer icon at the bottom of the Layers panel.
2Choose Enhance→Adjust Color→Adjust Hue/Saturation to open the Hue/Saturation dialog box.
Alternatively, you can press Ctrl+U (Command+U on the Macintosh).
3Drag the Saturation slider to the far left to desaturate the image, and click OK.
All color disappears, but the brightness values of all the pixels remain unaffected.