The bank in RuneScape is as important as RuneScape Gold. To help organise your bank account, you can arrange specific items into 'tabs'. At the top of the interface, you will see two main tabs; the first of these is the 'All' tab, and is marked with the 'infinity' symbol (which looks like a sideways 8). This tab shows every item and RS Gold in your bank account.
To set up a tab, simply drag an item onto the tab marked with a '+'. This will create a new tab that will only show a set of items that you specify and will be marked with the item you first drag onto it. Dragging more items onto the tab will place them into that section of your bank account. Each of these sections will be marked in your main account window, or you can click on the tab to view only those items.
For instance, if you want to keep your melee combat gear in an easy-to-find location, you might like to keep all of it in a specific tab. You will still be able to find it in your main account (by clicking the 'All' tab), but you can choose specific items to be displayed to make accessing them much quicker.
You may also drag items from a Search into a tab or to create a new one. Up to 8 tabs can be created at any one time. For an at-a-glance view of how many spaces remain in your bank, look at the counter in the top-right of your bank screen, and manage your RS Money.
To remove a bank tab, right-click on it and select 'Collapse tab'. A tab will also be removed if you clear it of items.
More information and Cheap RS Gold is here, at RSMoney.net.