To provide a display apparatus allowing an operator to easily find a desired icon. A display apparatus comprises a processor for executing a program of an operation button display control function. When an input is made for selecting one of a plurality of categories and scrolling a window P in a vertical direction, the operation button display control function scrolls only part of the window P representing the selected category in the vertical direction so that operation buttons B that belong to the selected category and are not displayed in the window P become displayed in the window P. When an input is made for scrolling the window P in a horizontal direction, the icon display control function scrolls the window P as a whole in the horizontal direction so that operation buttons B in a category that is not displayed in the window P become displayed in the window P.
