This is where user sets up the default Sales and A/R General Ledger numbers, and the ranges for the A/R Aging screen.   By setting up default account numbers for Sales and A/R here, each time an entry is created for Sales or A/R, the accounts will already be assigned for posting. 

Note: that the accounts selected as defaults must have the class of posting in the General Ledger Account Setup screen.  If you have the Multi-Plant version of Manex, prepare defaults for each division set up previously in G/L Divisions /Departments screen.