(examples)

Vertical layouts are defined by setting the "direction" prop to "vertical".
top
bottom
1<PanelGroup direction="vertical">
2 <Panel defaultSize={50} maxSize={75} minSize={10}>
3 <Text>top</Text>
4 </Panel>
5 <ResizeHandle />
6 <Panel maxSize={75} minSize={10}>
7 <Text>bottom</Text>
8 </Panel>
9</PanelGroup>