PanelExpanderButton伸缩按钮点击之后，会使拖动后的布局恢复到默认的，怎么使点击按钮之后，不影响布局
I don’t understand what you want. It would help if you included a screenshot showing what you have and another one showing what you want.
Maybe this talks about what you need: GoJS Layouts -- Northwoods Software