Started with Adobe Photoshop
Computing Resources >> Tutorials >> Graphics & Multimedia>> Getting Started with Adobe Photoshop
The most difficult aspect of working in Photoshop for me to master when I first used it was how to work in a document on multiple layers. Though you can perform an uncanny number of operations using the layers pane and menus, I'll only go over the basics to reduce beginner's confusion.
Adding New Layers
Go to Layer> and Select New Layer. Type a name for the layer in the dialog box that appears and hit enter. It should now appear in the layers pane (but since it is currently empty, there will be no sign of it in the image. Select the text tool from the tool bar and click & drag somewhere on the image (making sure the new layer is still highlighted in blue).
For starters, on the top text layer, click the eye icon. You'll see that it toggles the layer between show and hide. When you click on the paintbrush next to it, which represents that this is the layer you're currently working on, nothing happens. Now click on the name of the layer below. You see that the paintbrush now shows on the new active layer.
You can click on the empty paintbrush box to lock and unlock layers to avoid unwanted changes. The squiggle means it's locked.
I already showed you one way to add a layer, but there's a quicker and easier way. Just click on the dogeared page icon at the bottom of the layers pane. You can double click on this layer's name to change it. If you want to delete a layer, you can either drag it to the trash icon at the bottom of the layers pane or select the layer and click the trash icon.
When you merge or flatten layers that contain text layers, you will be
asked whether you'd like to rasterize that text (that is, convert it to
an image and lose the ability to edit it). I find it's a good idea to
copy any layers and hide them before you rasterize and merge. It saves
you the work of completely recreating layers if you decide to change text.