Tutorials for learning about layers, layer effects, layer masks, adjustment layers and layer blend modes in Photoshop from About.com - |
http://graphicssoft.about.com/od/photoshoptutorialslayers/index_a.htm |
THE PHOTOSHOP BIBLE - tutorials are specifically written for Adobe Photoshop and this one on layers -
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http://www.digimods.co.uk/tutorials/layers.htm |
Blend Mode Magic pdf from AdobeEvangelists.com
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http://www.adobeevangelists.com/pdfs/photoshop/Blendmodemagic.pdf |