To sum up, there are two primary types of masks in Photoshop: layer masks and clipping masks.
Layer masks use values of gray to assign levels of transparency to specific portions of a layer
or group of layers while clipping masks use the transparency of one layer to define that of a different layer or group of layers
There are many resources and websites that offer information about Photoshop layers. Some of these websites that offer information are Adobe, Photoshop Essentials and Photoshop Cafe.
There is no such option in Photoshop. If you mean Vector Photoshop shapes then the shapes can be used for infinite things in Photoshop such as layers, masks, as frames, as a source for selections, as a source for actual brushes, for patterns, for exporting to other applications, used in shape blurs, used as cookie cutters in Photoshop elements. Illustrator vector brushes exist as do expression and Xara vector brushes and many others but sadly, as yet, Photoshop has no vector format brushes.
Vector mask is mask which will be added to layer automaticaly when you work with shapes in Photoshop. There are two types of masks-layer masks and vector masks. Both control which parts of an image or layer will be hidden or revealed, and the masks can have special effects and styles applied to them. (See related link)
color layers is simply color layers
Open the Layers window.
Yes, .psd files maintain the layers you create in Photoshop so that the next time you open your .psd file in Photoshop you can continue to work directly onto the layers.
One layer.
To store image parts.
To select all layers in photoshop for a PC open up your layers window (It is under window - layers), hold down the shift key and click on each layer that you want to group together or edit.
Flattening layers just merges all layers down into one. It reduces file size, but once the image is saved and Photoshop is closed, you will no longer be able to undo the change and edit those layers separately.
Palette is a set of various panels. Panels like LAYERS, MASKS, PATHS.. are very important and contains many options not available from menus. Palette is a part of workspace and by default located on the right side of screen
I opened a new project in Photoshop Elements 6 and began adding layers. I'm at over 360 and it hasn't stopped yet :D My guess is, it will add as many layers as your computer can handle without crashing.