Oneclick has the ability to categorise Gmails for you, an example could be categories for Gmails that get oneclicks on Shopify Checkout and oneclicks for Supreme. As you can see from the below, the category column is on the left-hand side, if you double-click 'Category' it will arrange all Gmails into category order.
To select a category click on the category on the left-hand side. All the Gmails in that category will then be visible on the screen.
You can assign accounts to specific categories when you add or edit the account.