http://www.aaa3.net/how-to-scale-layer-photoshop/
When creating a halftone in Photoshop the layer locks?
At the moment i am trying to create a halftone in photoshop.
When i first open the image it’s full color & the layer is unlocked.
Then i change the image to grey scale, then to Bitmap.
In Bitmap i choose the frequency & once i click okay the layer locks.
How do i unlock the layer so i can make some more changes?
Bitmap mode does not support working in layers – so you must temporarily switch back to one that does, such as grayscale or RGB, for example.
Comic Book Effect: Adobe Photoshop CS3 Part Two
