Ask as many questions a you like. But those who do some basic research will be favored.
For example, the manuals are informative. Since you did not indicate which product version or derivative, AI, LE, Artist Pro etc, I can’t point you to an exact entry.
So go to http://steinberg.help, and in the manual for you product search for Legato and for Quantize. Lots of good reading, correct information from the authoritative source.
Also, Pease have a look at the Forum Guide