I know this has been requested earlier in a couple of topics but it would be really convenient for companies with lots of customers and suppliers to be able to make them into collapsable groups based on a keyword or some other property. It would be different from grouping them using a custom field in columns since one would be able to just hide/unhide companies with a click of a button to make the screen less cluttered and not have to manually search the keyword each time.
It looks like you would need to create an account control for each customer or supplier, and then group those accounts together. This way, all customers can be displayed in a structured manner on the balance sheet