hi @Anonymous set the width and height as variable for what you deem as a small screen.
{OnStart}
Set(smallScreen,{width: yourSmallScreenWidthValue, height: yourSmallScreenHightValue})
As an example i will use texboxes to show and hid a control, with width 126

the rectangular's visible is set to Self.Width >= smallScreen.width
Lets set the with to smaller than 126 (120)

The rectanuglar contrl is not visble anymore.
Summary
Set your screen dimension for small screen
Set(smallScreen,{width: yourSmallScreenWidthValue, height: yourSmallScreenHightValue})
Set the visibiltiy of the control to Self.Width >= smallScreen.width || Self.Height >= smallScreen.height
Hope this helps
R