When Banker, select Command > Regional Food Status...
On that page, a banker can look at a market. If player does a transaction on the market (or several), it's a bit of a hassle to go back to the Regional Food Status to go to another market.
My suggestion is to add a Return to Regional Food Status button on
http://www.battlemaster.org/stable/Marketplace.php which would help players out. It would take about 2 seconds to code and help alleviate a lot of repetitive clicks.