Why is Synopsis overview in Config Manager so large?

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Synopsis form is very simple. Panel paMain contains a box control that we fill.


As usual we register paMain in the form Show


When we open it in Configuration Manager we see our panel -- Backing fills the screen area (no grid)


If you click in the middle - You see the title bar. The big panel hides the ManualInjector and Column displays.


If I resize the window



Click in middle and again it resizes automatically to fill screen. Is our integrated driver getting special treatment?