You can customize the window layout with a feature called dockable windows. Clicking and dragging the tab of a window activates this feature. These arrows act as a guide showing where the window will be docked or placed after the tab is released. The outer arrows dock the window across the entire outer edge of the platform. The inner arrows dock the window across the outer edge of a specific window. To dock a window as a tab instead of placing the window besides another, release the mouse over the arrow next to the tab.