To add the most popular symbols used on CDs and DVDs to your artwork, just add a new text layer and select the Common Logos font (looks like symbols). Using the "Common Logos Key" to the right you can then add the symbols you need in your design.
Example:
Add a new text layer
double click on the layer and Cntrl A (Cmd A on a Mac) to select all
delete the word Text and type P
click off the layer and then back on again – Control A to select All
change to the common logos font and the circle P shows up