Using selection tools from Toolbox: Magic Wand, Quick Selection tool, Rectangular and Elliptical Marquee tools...
You can not add music to image in Photoshop.
To crop a selection in Photoshop, use the Crop Tool to draw a selection around the area you want to keep. Then, press Enter or click the checkmark icon to apply the crop.
There are many selection tools in Photoshop including Color Range. For Tools take a look at Options Bar and move arround icons until you see pop-up tooltip Subtract from selection, then press that icon.
Go to the Select menu, then select Save Selection. Then type in a name for the selection and click OK.
Yes you can
To select all areas of the same color in an image using Photoshop, you can use the Magic Wand tool. Simply click on a part of the image with the color you want to select, adjust the tolerance level to refine the selection if needed, and then press Shiftclick to add more areas of the same color to your selection.
We use Lasso tools (Lasso, Polygonal Lasso and Magnetic Lasso tool) to make selections. You can make new selection, add, subtract or intersect with existing selection using Lasso tools. For more details visit related links.
enable photoshop to add extra temporary files
Adobe photoshop
the masking tool
Selections tools inside Adobe Photoshop are : Lasso tools, Marquee tools, Magic Wand and Quick Selection, Color Range from Select menu and you can also trace edges with Pen Tool or Magnetic Pen Tool which is accessible when Freeform Pen Tool is active.
Alpha channel, take a look at CHANNELS palette