The image stretching mode.
The following stretching modes are available:
- OriginalSize - an image is displayed as is, without stretching. An element's header is auto-sized to fit the assigned image.
- Squeeze - a large image is scaled down to fit the height of the header's content region, while a smaller image is displayed as is.
- Stretch - an image is proportionally resized to fit the height of the header's content region.
In the OriginalSize mode, the image height affects the header height, while in the Squeeze and Stretch modes, the header height limits the image display size. You can use the following properties to manually change the header height of elements: AccordionControlElementBase.Height, AccordionControl.ItemHeight and AccordionControl.GroupHeight.
The height of a header's content region is determined by the header height minus content vertical margins.