In an input apparatus, a display portion displays a plurality of function items on a screen to form a plurality of rows that are parallel in a predetermined row direction. The function items are provided with selection regions, respectively. One of the selection regions is selected, using a pointer according to a predetermined selection manipulation, and is determined according to a predetermined determination manipulation. When a first function item in a first row of the plurality of rows is selected, a selection region of the first row is enlarged in a direction directing at a row next to the first row.