Currently tool windows cannot be re-sized proportionally in this scenario.
RadDock should support a MDI mode where the child mdi forms are displayed in the old fashioned way.
Use cases: 1. You have a MainDocumentContainer with Document windows in it, placed in one under the other. Setting the DockState of the bottom DocumentWindow to Hidden, and restoring it afterwards, should place the DocumentWindow at the same place, instead of merging it with the above one 2. Same layout as above, when the layout is saved and then restored, the DocumentWindow positions should be exactly as they were