With the form open and in Design Mode, select
[FlexLayout] in the Toolbox.
To create the initial size and position of the component,
left-click and drag a box on the form.
To open the
[Edit FlexLayout
Attributes]
dialog box, click the [Edit FlexLayout] button in the upper left
corner of the component
To cause any regions created to display as columns, specify
[HorizontalBox] In the [Type] field. To cause any
regions created to display as rows, specify [VerticalBox] in the [Type] field.
By default, the FlexLayout component contains one region. To
create additional regions, click
[Add].
For each region, set the properties and attributes that control
how the FlexLayout component is to display.