For applications running in Windows, when doing the Copy or Cut operation we must use the Clipboard - which requires more RAM.
This is a temporary storage area of memory. With Photoshop, when you do the above, the saved objects will remain in RAM, even if you have completed the above operations. We know that much of the free space is wasted by Photoshop. Therefore, we need to limit the use of Clipboard. This is contradictory, because not using the Clipboard how to do the Copy or Paste operation? The following tips will be the answer for you.
Copy a selection: After creating the selection, press (V) to move to the tool. Hold down the Alt key while dragging the selection (Move tool will move to double arrow - show copy), so you have a copy of the original selection. It is simple.
Copy a Layer: In the Layers palette, click on the name or thumbnail of the layer to copy and drag it to the New Layer icon next to the bottom of the Player palette.
Copy a selection, a layer from this image file to another image file:
Press (V) to move to the tool. You can use the mouse to perform a "drag and drop" selection, or even a layer of this image file into another image file. Then, the mouse pointer is an arrow with the + sign attached.
Copy one color channel (Chanel) from one image to another: In the Channels palette of the image file to be copied, you use the mouse to perform "drag" the color channel of this image file from the file destination image.
