A small editor extension to add additional text informations into the Inspectors TextFields

AdditionalTextAttribute.cs

using UnityEngine;

namespace Assets.Soraphis.MiniScripts {
    public class AdditionalTextAttribute : PropertyAttribute {

        public readonly string Text;
        public AdditionalTextAttribute(string text) {
            Text = text;
        }
    }
}

AdditionalTextDrawer.cs

using UnityEditor;
using UnityEngine;

/*
 * usage: simply put a Attribute in front of your variables like this:
 *     [AdditionalText("Pixel")]public float MinimumDragDistance = 20;
 * - use at own risk for variables that are not rendered in textfields (you'll might get multiple texts over each other)
 */


namespace Assets.Soraphis.MiniScripts.Editor {

    [CustomPropertyDrawer(typeof(AdditionalTextAttribute))]
    public class AdditionalTextDrawer : PropertyDrawer {
        public override void OnGUI(Rect position, SerializedProperty property, GUIContent label) {
            //base.OnGUI(position, property, label);
            EditorGUI.PropertyField(position, property, label);

            var style = new GUIStyle(EditorStyles.label);
            style.alignment = TextAnchor.MiddleRight;
            style.normal.textColor = Color.gray;

            var attrib = attribute as AdditionalTextAttribute;
            GUI.Label(position, attrib.Text, style);
        }
    }
}