diff --git a/editor/ui/dialogs/content/EdAEAttributes.js b/editor/ui/dialogs/content/EdAEAttributes.js
index 075a3ca1a28f..3f351e610035 100644
--- a/editor/ui/dialogs/content/EdAEAttributes.js
+++ b/editor/ui/dialogs/content/EdAEAttributes.js
@@ -123,6 +123,7 @@ var gVAlignTable =
    are signal to do input filtering:
     "#"  Allow only integer values
     "%"  Allow integer values or a number ending in "%"
+    "+"  Allow integer values and allow "+" or "-" as first character
     "!"  Allow only one character
     "^"  The first character can be only be A-Z, a-z, hyphen, underscore, colon or period
     "$"  is an attribute required by HTML DTD
@@ -616,7 +617,7 @@ gHTMLAttr.fieldset =
 // this is deprecated //
 gHTMLAttr.font =
 [
-  "#size",
+  "+size",
   "color",
   "face",
   "-",
diff --git a/editor/ui/dialogs/content/EdAEHTMLAttributes.js b/editor/ui/dialogs/content/EdAEHTMLAttributes.js
index 72c5cc3feaed..58969e080b00 100644
--- a/editor/ui/dialogs/content/EdAEHTMLAttributes.js
+++ b/editor/ui/dialogs/content/EdAEHTMLAttributes.js
@@ -72,12 +72,13 @@ function BuildHTMLAttributeNameList()
         // Get information about value filtering
         var forceOneChar = name.indexOf("!") >= 0;
         var forceInteger = name.indexOf("#") >= 0;
+        var forceSignedInteger = name.indexOf("+") >= 0;
         var forceIntOrPercent = name.indexOf("%") >= 0;
         limitFirstChar = name.indexOf("\^") >= 0;
         //var required = name.indexOf("$") >= 0;
 
         // Strip flag characters ("_" is used when attribute name is reserved JS word)
-        name = name.replace(/[!^#%$_]/g, "");
+        name = name.replace(/[!^#%$_+]/g, "");
 
         menuitem = AppendStringToMenulist(dialog.AddHTMLAttributeNameInput, name);
         if (menuitem)
@@ -92,6 +93,7 @@ function BuildHTMLAttributeNameList()
           menuitem.setAttribute("forceOneChar", forceOneChar ? "true" : "");
           menuitem.setAttribute("limitFirstChar", limitFirstChar ? "true" : "");
           menuitem.setAttribute("forceInteger", forceInteger ? "true" : "");
+          menuitem.setAttribute("forceSignedInteger", forceSignedInteger ? "true" : "");
           menuitem.setAttribute("forceIntOrPercent", forceIntOrPercent ? "true" : "");
         }
       }
@@ -300,6 +302,14 @@ function onInputHTMLAttributeValue()
       {
         value = value.replace(/\D+/g,"");
       }
+      else if ( selectedItem.getAttribute("forceSignedInteger") == "true" )
+      {
+        // Allow integer with optional "+" or "-" as first character
+        var sign = value[0];
+        value = value.replace(/\D+/g,"");
+        if (sign == "+" || sign == "-")
+          value = sign + value;
+      }
       
       // Special case attributes 
       if (selectedItem.getAttribute("limitFirstChar") == "true")