Patent ID: 8266548

Claim:
A method executable by a processor of a computer, the method comprising: displaying nodes in N number of levels of a first hierarchy tree on a display; receiving input of a selected node of the nodes to open a level below the N number of levels of the first hierarchy tree; fading out nodes in a level of the N number of levels above the level that includes the selected node from the first hierarchy tree on the display; forming a second hierarchy tree on the display; fading in a parent node of the selected node into the second hierarchy tree on the display; fading in nodes in the level below the N number of levels of the first hierarchy tree into a level in the first hierarchy tree below levels remaining in the first hierarchy tree on the display; and sequentially moving at least one node of the nodes in the N number of levels remaining in the first hierarchy tree up in the first hierarchy tree on the display; wherein at least one of a velocity and an acceleration of the fading out nodes in the level of the N number of levels, fading in the parent node and the fading in nodes in the level below the N number of levels decreases as a complexity of the first hierarchy tree increases.