By design Investor/RT does not have minimize, maximize, restore buttons on the title bar, only the close button. Multipane charts typically have Minimize, Maximize and restore button available at the top right section of the button pane (see more details below). For other windows type, right-clicking in the title bar usually offers a menu of choices for Minimize, Maximize and Restore actions (with the Alt - keyboard combination also minimizing any selected window). All windows, charts, quote pages, preferences windows, object manager, etc. are floating windows.