i am new to DBpoweramp..but am loving it!!! this program makes things so easy!!!

am not a computer geek but i kind of know how to do some tasks :-)...here is my query

i need to remove the first 3 characters from selected song names ie( 10.sad heart, 04.dance )..what is the formula that i need to compile in order to do this?

thank you so much!

ps: would be great if there was a instruction manual on how to learn the basics for those programmable commands