ROToolbox: @Layout Help

Anyone have any tips or easy explanation on how to create the template for @Layout in ROToolbox?
We have some layout customizations that we want to port to v11, but they were accomplished in some...creative ways, that will not port to the new version easily. I was hoping to rebuild them using ROToolbox if possible. Some of the v11 updates to ARO will make this easier, but looking for specific examples of indenting fields, multiselect pickers, etc.
Thank you!