FAQ 21: Some Photoshop filters are grayed out in the flter menu |
Check to see if you're working in RGB:
Image / Mode ... (some Photoshop filters don't work in other color modes than RGB).
Also make sure that you're working in 8 bits/channel.

FAQ 22: How to copy an image from one Photoshop document to the other? |
- Open both images.
- Click on the move tool icon
in the tool bar
- Click on the image that you want to move inside the document window
- Hold down the mouse button
- Move cursor to the other document
- Release the mouse button
FAQ 23: I want to change the color of an object, a car for example. |
A popular way to do this is by using the a
Hue/Saturation correction:
Image / Adjustments / Hue/Saturation...
Check out
step 6 of
Changing the color of an eye tutorial.
FAQ 24: I can't copy a layer mask by dropping it onto the mask icon in the layers palette |
In Photoshop CS2 you have to drag a mask from one layer and drop it onto the other layer while holding down the Alt (Option key on the Mac).