Hi,
You must use "<textarea>" control for wrapped. And you can use "<b>, <u>, <i>...." in text area for format.
<textarea id="txtContent" styled="true"></textarea>
after
TextArea txtExtra = (TextArea) Kuix.getCanvas().getDesktop().getCurrentScreen().getWidget("txtExtra");
txtExtra.setText("kadir <b><u>AKIN</u></b>, <u>test</u> project");