If you are really new to Katalon Studio, if you have no idea what to do, then you should start with the sample built-in projects.
Your question is still ambiguous. You haven’t given us any concrete information.
- Please specify a public URL on which you want to do “safe pictures”. If your actual target is a public one, please share its URL. If your target is not public, then choose any public URL as fixture. Unless active URL as target is set and shared, nobody would be able to co-operate.
- Please specify which HTML element you want to target. Possibly you should learn how to use Chrome DevTools, and tell the “XPath” of the element in the target page.
- Please specify what you want to do with the picture.