GUILayoutMaxWidth

GUILayoutMaxWidth is a property in Unity's legacy IMGUI system that controls the maximum width a GUI element can occupy when automatically arranged using `GUILayout` functions. When using `GUILayout.BeginHorizontal()` or `GUILayout.BeginVertical()`, elements are arranged and sized based on their content and available space. By default, elements can expand to fill available space. However, `GUILayoutMaxWidth` allows developers to set an explicit upper limit on how wide a particular GUI element can become within this automatic layout.

This property is useful for preventing elements from becoming excessively wide and distorting the overall layout, especially on different screen resolutions or when dealing with content that might otherwise stretch indefinitely. It can be applied to individual GUI controls like buttons, labels, or text fields, or to container groups using `GUILayout.BeginArea()` or similar. Setting `GUILayoutMaxWidth` to a specific pixel value will ensure the element never exceeds that width, even if there is more space available. If not explicitly set, or set to a value like `Mathf.Infinity`, the element will expand to fill available space. Understanding and utilizing `GUILayoutMaxWidth` is key to achieving predictable and visually appealing GUIs with the IMGUI system.