Hi Gilbert,
You need to put your png file under ‘webContent’ folder.
You can point to this image using ‘Image control’ which you can find in palette, drag drop that control to canvas.
In the URL Property set the path of the image starting from webContent folder.
Then deploy your portlet to MWS server. Then you will be able to see the image on your portlet.
#webMethods#webMethods-BPMS#MWS-CAF-Task-Engine