GUILayout.Height

Description

Option passed to a control to give it an absolute height.

Note: This option will override the Automatic height Layout parameter


Fixed Height for a GUI Control.

using UnityEngine;

public class ExampleScript : MonoBehaviour
{
    // Draws a  button with a  fixed height
    void OnGUI()
    {
        GUILayout.Button("A Button with fixed height", GUILayout.Height(300));
    }
}