PropertyDrawer.GetPropertyHeight
GetPropertyHeight(property: SerializedProperty, label: GUIContent): float;
float GetPropertyHeight(SerializedProperty property, GUIContent label);
def GetPropertyHeight(property as SerializedProperty, label as GUIContent) as float
Parameters

property The SerializedProperty to make the custom GUI for.
label The label of this property.
Returns
float The height in pixels.
Description

Override this method to specify how tall the GUI for this field is in pixels.

The default is one line high.