You can change the dimensions of the form in different ways
like this
#Region Project Attributes
#MainFormWidth: 1024
#MainFormHeight: 768
#End Region
or with code
'Full Screen
MainForm.WindowWidth = fx.PrimaryScreen.MaxX - fx.PrimaryScreen.MinX
MainForm.WindowLeft = fx.PrimaryScreen.MinX
MainForm.WindowHeight = fx.PrimaryScreen.MaxY - fx.PrimaryScreen.MinY
MainForm.WindowTop = fx.PrimaryScreen.MinY
In the designer, select "Fit to connected device"
Be careful with Full Screen, your screens may not match those of your users.
Use anchors to adjust views.