maxTextAreaHeightNumber
Sets the maximum height of the textarea in pixels. The textarea resizes automatically until it reaches this height. When the content exceeds this height, a scrollbar appears.
Example
<div id="promptbox"></div>
<script>
$("#promptbox").kendoPromptBox({
mode: "auto",
maxTextAreaHeight: 200,
placeholder: "Textarea will not exceed 200px..."
});
</script>