Rebuild RE80 / SE80 menu - tree in splitter container

Hello,

I'm trying to create an ALV output with one tree at the left and two grids at the right. For layout I would prefer displaying it like RE80 or SE80 screen. My question is about the tree at the left in combination with the splitter container. It worked for me building a global custom container in which I use two splitter, one at the left for the tree and one at the right for the grids. But how can I place buttons on the left on top of the tree like in RE80/SE80 In my dynpro I only got the global custom container.

Regards

Michael