Sunny, you're going to have a lot of fun with your new keyboard. The learning curve is somewhat steep, but I strongly urge that you follow Don Mason's advice and bookmark the psr tutorial site. You'll find a wealth of information that will make learning how to navigate the 2100 much easier.
Have Fun,
Gary
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)