Here's a comprehensive solution for handling text size in Unity: using UnityEngine; using UnityEngine.UI; [RequireComponent(typeof(Text))] public class TextSizeAdjuster : MonoBehaviour { [SerializeField] private float minFontSize = 10f; [SerializeField] private float maxFontSize = 100f; [SerializeField] private float padding = 5f; [SerializeField] private bool autoAdjustOnStart = true; [SerializeField] private bool maintainAspectRatio = true; private Text textComponent; private RectTransform rectTransform; private float originalFontSize; private void Awake() { textComponent = GetComponent(); rectTransform = GetComponent(); originalFontSize = textComponent.fontSize; } private void Start() { if (autoAdjustOnStart) { AdjustTextSize(); } } public void AdjustTextSize() { if (textComponent == null || rectTransform == null) return; float availableWidth = rectTransform.rect.width - (padding * 2); float availableHeight = rectTransform.rect.height - (padding * 2); textComponent.fontSize = (int)Mathf.Clamp(originalFontSize, minFontSize, maxFontSize); textComponent.horizontalOverflow = HorizontalWrapMode.Overflow; textComponent.verticalOverflow = VerticalWrapMode.Overflow; if (maintainAspectRatio) { float widthRatio = availableWidth / textComponent.preferredWidth; float heightRatio = availableHeight / textComponent.preferredHeight; float ratio = Mathf.Min(widthRatio, heightRatio); textComponent.fontSize = Mathf.Clamp( Mathf.RoundToInt(textComponent.fontSize * ratio), (int)minFontSize, (int)maxFontSize ); } else { // Adjust based on width only float widthRatio = availableWidth / textComponent.preferredWidth; textComponent.fontSize = Mathf.Clamp( Mathf.RoundToInt(textComponent.fontSize * widthRatio), (int)minFontSize, (int)maxFontSize ); } } public void SetText(string newText) { if (textComponent != null) { textComponent.text = newText; AdjustTextSize(); } } public void SetMinFontSize(float size) { minFontSize = size; AdjustTextSize(); } public void SetMaxFontSize(float size) { maxFontSize = size; AdjustTextSize(); } public void ResetToOriginalSize() { textComponent.fontSize = (int)originalFontSize; } } using UnityEngine; using System.Collections.Generic; public class TextSizeManager : MonoBehaviour { public static TextSizeManager Instance { get; private set; } [SerializeField] private float globalTextScale = 1f; [SerializeField] private List textAdjusters = new List(); private void Awake() { if (Instance == null) { Instance = this; DontDestroyOnLoad(gameObject); } else { Destroy(gameObject); } } public void RegisterText(TextSizeAdjuster textAdjuster) { if (!textAdjusters.Contains(textAdjuster)) { textAdjusters.Add(textAdjuster); textAdjuster.SetMinFontSize(textAdjuster.GetMinFontSize() * globalTextScale); textAdjuster.SetMaxFontSize(textAdjuster.GetMaxFontSize() * globalTextScale); textAdjuster.AdjustTextSize(); } } public void UnregisterText(TextSizeAdjuster textAdjuster) { if (textAdjusters.Contains(textAdjuster)) { textAdjusters.Remove(textAdjuster); } } public void SetGlobalTextScale(float scale) { globalTextScale = Mathf.Clamp(scale, 0.5f, 2f); UpdateAllTextSizes(); } private void UpdateAllTextSizes() { foreach (var adjuster in textAdjusters) { if (adjuster != null) { adjuster.SetMinFontSize(adjuster.GetOriginalFontSize() * 0.5f * globalTextScale); adjuster.SetMaxFontSize(adjuster.GetOriginalFontSize() * 2f * globalTextScale); adjuster.AdjustTextSize(); } } } public float GetGlobalTextScale() { return globalTextScale; } } using UnityEngine; using UnityEngine.UI; public static class TextSizeUtility { public static float CalculateOptimalFontSize(Text text, RectTransform container, float padding = 5f) { if (text == null || container == null) return text.fontSize; float containerWidth = container.rect.width - (padding * 2); float containerHeight = container.rect.height - (padding * 2); int minSize = 1; int maxSize = 300; int optimalSize = maxSize; for (int size = maxSize; size >= minSize; size--) { text.fontSize = size; text.horizontalOverflow = HorizontalWrapMode.Overflow; text.verticalOverflow = VerticalWrapMode.Overflow; if (text.preferredWidth <= containerWidth && text.preferredHeight <= containerHeight) { optimalSize = size; break; } } return optimalSize; } public static void FitTextToContainer(Text text, RectTransform container, float padding = 5f) { if (text == null || container == null) return; float optimalSize = CalculateOptimalFontSize(text, container, padding); text.fontSize = (int)optimalSize; } }