diff --git a/scene/ItemCommon.cpp b/scene/ItemCommon.cpp
index b80ff2a..ad9d1a4 100644
--- a/scene/ItemCommon.cpp
+++ b/scene/ItemCommon.cpp
@@ -557,6 +557,23 @@ QImage ItemUtils::txtToImage(const QString &txt, const QFont &font, const QColor
     QFontMetrics fm(font);
     int width = fm.horizontalAdvance(txt);
     int height = fm.height();
+
+    // 优先使用字体名中后缀标识的字体高度
+    QString fontname = font.family();
+    QString numStr = "";
+    for(int i = fontname.length() - 1; i >= 0; --i) {
+        if(fontname[i].isDigit()) {
+            numStr.prepend(fontname[i]);
+        } else {
+            break;
+        }
+    }
+    if(!numStr.isEmpty()) {
+        height = numStr.toInt();
+        if(height < 5 || height > 32)
+            height = fm.height();
+    }
+
     if (width <= 0 || height <= 0) {
         return QImage();
     }
diff --git a/scene/pictextitem.cpp b/scene/pictextitem.cpp
index 9d2eee5..195000e 100644
--- a/scene/pictextitem.cpp
+++ b/scene/pictextitem.cpp
@@ -404,7 +404,7 @@ QImage PicTextItem::strToImage(const QString &str)
 QPointF PicTextItem::clampItemPos(const QPointF &p)
 {
     return QPointF (std::min(qreal(scene()->width() - boundingRect().width()), std::max(0.0, p.x())),
-                   std::min((qreal(scene()->height() + 1) - boundingRect().height()), std::max(0.0, p.y())));
+                   std::min((qreal(scene()->height()) - boundingRect().height()), std::max(0.0, p.y())));
 }
 
 TextItemModel TextItemModel::fromItem(PicTextItem *item)