Patent ID: 7557813

Claim:
A picture displaying method of arranging mapping corresponding to the whole or a part of a material that has a time concept in time series on a screen, comprising the steps of: setting gradation, utilizing a setting unit, to the mapping of the whole of the material; and adding gradation, utilizing an adding unit, that is set to a region corresponding to the arranged mapping of the gradation that has been set to the whole of the material to the arranged mapping, wherein the mapping has a rectangular shape, adding, utilizing the adding unit, a part of a diagonal line added to the region corresponding to the arranged mapping of a diagonal line of the mapping corresponding to the whole of the material to the arranged mapping, setting, utilizing the setting unit, color of the diagonal line for determining whether the region corresponds to the whole or which part of the material, wherein the color at the beginning of the gradation that has been set to the mapping corresponding to the whole of the material is the same as the color of the region corresponding to the arranged mapping of a diagonal line of the mapping corresponding to the whole of the material.