Disclosed are examples of marking screenshots and identifying screenshots that have been marked. A client application or a computing environment can generate a watermark template for encoding in a user interface of the client application where the watermark template is not visible to the user of a client device. If a screen capture event is performed on the client device where a digital image file of a screenshot is generated, the digital image file can be analyzed to identify the presence of the watermark template. If the watermark template is identified, a remedial action can be performed in association with the screenshot.