Task
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Description
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Change the shape or size of the selector knob
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On the Knobs panel, use the KnobStyle property to choose the shape, and the KnobRadius property to determine the size.
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Display a mark on the knob to indicate the selected position more precisely
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On the Mark panel, choose a value for MarkStyle other than None. To customize the appearance of the mark, use the other properties on the Mark panel.
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Remove the mark from the knob
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On the Mark panel, set MarkStyle to None.
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Determine whether the knob can select from a continuous or discrete range
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On the Knobs panel, check the KnobSnap check box to restrict the knob to discrete values. In this case, KnobSnapIncrement is the distance between successive discrete values. Clear the KnobSnap check box to allow the knob to assume all values in the range.
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Label the selector knob by displaying the corresponding number
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On the Digital panel, check the Digital check box.
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Change the appearance of the selector knob label
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On the Digital panel, use DigitalDecimals to set the number of digits after the decimal point, DigitalColor to set the color of the number, and DigitalFontID to refer to a previously defined font (on the Fonts panel).
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Move the selector knob label
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On the Digital panel, use DigitalX and DigitalY to set the fixed position for the label.
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Draw an annular region along the scale
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On the Annulars panel, increase the value of the Annulars property. The ID of the new region is the Annulars property value minus one. To specify properties of the new region, see the next task.
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Change the appearance of an annular region
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On the Annulars panel, first set AnnularID to the ID of the annular region you want to change. Use the Radius properties to control the annular region's thickness and radial position. Use the Value properties to control the portion of the scale's range that the annular region includes. Use Color to control the annular region's color.
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Delete the most recently added annular region
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On the Annulars panel, decrease the Annulars property. This deletes all properties associated with the region, such as its color and thickness.
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