Chart of Accounts Numbering

SUGGESTED

Is there some way to have operating revenues from Acct 4000-4999, Op Expenses 5000-5999, then a section for Capital Revenues 6000-6999 and Capital Expenses 7000-7999.  Basically I would like to have a revenue and expense section which would then provide an operating income and then a similar section for capital?

I have tried to cut off expenses at 5999, but it won't let me create another account group for the capital section