When looking at invoices (and payments) in POS History, it's sometimes difficult/annoying having to match up each invoice with each payment. Maybe put the invoice # on the payment screen also? or have it numbered in some way? Something to better keep track of which invoice goes with which payment.
Also, in Reports for sales you can filter by account but you cant fiter inventory by anything. Sorting inventory by vendor or account might be a useful feature. Or maybe an option to have the resulting list sorted by vendor? If I had excel installed then my problem would be fixed but it still might be nice...