Just Got confused someone help?

[MikeGee]

I've been reading for a lil while now, and i just noticed that for exaomple in the key of F when a B some up in the sheep music it will not have the flat symbol next to it? Or any other time a symbol is needed it won't sitting next to that not.

-Why am I just noticing this?

-Has anyone else seen where it will have the needed symbol next to every note?

-Is there a reason why the symbol not used?

[MikeGee]

I've been reading for a lil while now, and i just noticed that for exaomple in the key of F when a B some up in the sheep music it will not have the flat symbol next to it? Or any other time a symbol is needed it won't sitting next to that not.

-Why am I just noticing this?

-Has anyone else seen where it will have the needed symbol next to every note?

-Is there a reason why the symbol not used?

Awful lot of spelling errors. I've been looking for the edit button or the erase button so I can change this.

[B3Wannabe]

It's not necessary to put the flat on each note, because it's in the key signature.