What's the difference between Balance and Fixed Amount?

I am signing up for direct deposit on my company's website, I already have my account and bank routing number but another option is Balance or Fixed Amount. I don't know which to choose.|||A fixed amount would be saying a specific dollar amount should be deposited. If you have a savings account, I highly recommend using direct deposit to put a little in savings automatically each paycheck. Balance would be the remaining amount - either the full check amount if you just deposit it into one account or what's remaining after that fixed amount is deposited into savings.