I am novice to photoshop and working on converting PSD to * HTML*.
I learned that you can select a layer and Ctrl + A, and copy-paste to create a new image equal to the size of layer.
I also learned that you can copy by Ctrl + left mouse click, and copy-paste.
However I noticed that the second method is not good for copying layers with opacity. What is the difference between these two methods of copying layers?