The MICR Setup form can be opened from the Bank Account Information form - MICR button. This form is where you can configure how the MICR line should be displayed on checks. At the top of the form there are fields that display the Account ID and Description. In the MICR Line Configuration area, it is where the configuration of how the MICR line is being set and a preview on how the MICR line is displayed on checks will be shown in the MICR Preview field.
To illustrate how MICR is setup and how it works, see Setting up MICR Printing.