Thank you for your interest in the RadExpander control.
The observed behavior is the correct one according to the current implementation of the RadExpander control. Please note the Arrow sign points the direction where the expander's content will move if the animation is enabled. For example when the Expand Direction is Down (this is the default value) the arrow will point:
- Down when expander is collapsed (IsExpanded = False);
- Up when expander is expanded (IsExpanded = True);
Please preview the attached example where a form with four expanders is implemented as a visual aid.
We hope this information will help you.
the Telerik team