The applicaiton relates to a display system, a display apparatus, a manipulation apparatus and a function selection apparatus. Wherein the display system includes a screen panel (52), an input unit (31, 231), a switch section (S103, S106, S107, S203, S206, S207), and a resizing section (S104, S108, S204, S208). The screen panel (52) switches a display mode between a window selection mode and a function selection mode. The input unit (31, 231) includes an input panel (32) arranged apart from the screen panel (52), and defines an arrangement of input regions corresponding to an arrangement of display windows displayed in the window selection mode of the screen panel (52). When a target input region (S103, S106, S107, S203, S206, S207) is manipulated, the switch section sets the target input region as a selected input region, and the resizing section (S104, S108, S204, S208) enlarges a size of the selected input region and rearranges an enlarged selected input region (32) on the input panel.