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extension/Classes/Core/AbstractBuildForm.php

@@ -1447,6 +1447,7 @@ abstract class AbstractBuildForm {
             $colsRows[1] = 1;
         }
 
+        // Active Textarea if min-height>1 (rows) or third parameter max-height>0
         $flagTextarea = ($colsRows[1] > 1 || ($colsRows[2] ?? '') > 0);
 
         $formElement = HelperFormElement::prepareExtraButton($formElement, !$flagTextarea);