To display only a control needing customization by enabling a user to select and set a control which is not displayed in a customization setting window.

In a step 1801, customization information is read from a registry. In a step 1802, initialization processing of a set value or the like of each control is performed. In a step 1803, on the basis of the customization information read in the step 1801, display or non-display of each control is processed. In a step 1804, on the basis of the customization information read in the step 1801, with reference to move distance information on each control, move processing of the control is performed.