upContents The contents for the up button. Declarationvar upContents: TCControlContents? { get set } DiscussionMay be nil. See AlsoInspecting the descriptorcompositeLabeldownContentsdownLabelhighlightDurationinputIsMutuallyExclusiveisDigitalisRadialleftContentsleftLabeloffsetrightContentsrightLabelsizeupLabelzIndex