C# - set Size for ScrollView


I made a ScrollView inside a window.

scrollPosition = GUILayout.BeginScrollView(scrollPosition, GUILayout.Width(UnityEngine.Screen.width-727), GUILayout.Height(UnityEngine.Screen.height-55));



I am using my game with a touchscreen. So for thin fingers the defaults are fine. But I would say for thicker fingers the ScrollView is abit too small.

I didn´t find where I can set the width in the parameters or in the skin.
Can anyone tell me please how I am able to set the width of this ScrollView?

Thank you in advance.

Select your Gui Skin in project, then in inspector Horizontal Scroller Thumb → select Stretch Width or Stretch Height as needed. Similarly you do it for Horizontal scrollerbar. I assume this is a horizontal scroll, if not do the same for vertical.