I agree with TS.
When it comes to multi FX (considering you are a multi FX noob), do not, I say, DO NOT disregard the manual.
You have to spend time and effort reading the manual to understand what each buttons do and what they control.
Once nagamay mo na, magiging madali na ang pag tweak, mas mahirap pa ata gumamit ng family computer.
I use both Boss and TC Electronics multi FX.