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.