How can I crop a single layer in Photoshop?
Is it possible to crop a single layer, I can almost get the desired outcome using the eraser on a layer but surely it can be done with cropping?
Are you trying to accomplish something photography related? This might be better on http://graphicdesign.stackexchange.com/.
Agree. For example this: http://graphicdesign.stackexchange.com/questions/7011/photoshop-select-item-and-crop-it-directly
It just doesn't make any sense why you'd want to crop a layer and make your entire composition follow that resolution...one of the most annoying things about photoshop IMO
Use a layer mask. Tutorials galore exist on the topic already, eg: http://helpx.adobe.com/photoshop/using/masking-layers.html
Straight from Adobe:
You can add a mask to a layer and use the mask to hide portions of the layer and reveal the layers below. Masking layers is a valuable compositing technique for combining multiple photos into a single image or for making local color and tonal corrections.