EDIT SYNC SETTINGS: From the desired email account settings screen, select Email sync schedule > Set sync schedule > desired sync schedule.
ADD/EDIT SIGNATURE: From the desired email account settings screen, scroll to and select Signature > enter the desired signature > Save.
CHANGE SERVER SETTINGS: From the desired email account settings screen, scroll to and select Server settings > edit Server settings as desired > select Done.
REMOVE ACCOUNT: From the desired email account settings screen, select Remove > Remove.