Here you can use one approach:
1) , TLayout, "LayoutMain" ( alClient) .
2) " ", , , MDI, TLayout ( "FormContainer" - ), ( ) TLayout ( "FormHeader" ), Caption, Minimize/Maximize/Close , "frame". .
3) ( ), TLayout "LayoutMain" TLayout "FormContainer" .
4) TLayout ( "FormHeader" ) OnMouseDown OnMouseMove, .
, TLayout "FormContainer" alClient, Top, Left, Width Height "".
, , , , , FireMonkey, ( 2).
, Embarcadero MDI FireMonkey " ", MDI .
Docking, IDE RAD Studio. , , , ( ).