I have a custom post type (yacht). If I upload an image I want the image to fit on a background and add the Logo as watermark on the bottom right. I sent you the images in the chat. The original image should be saved original. No Watermark, no background. Just the other sizes should get the background, as well as the watermark (1024x768, 768x574, 300x224). The Logo (watermark) should be always 25% width of the image and on the right bottom (maybe 1% from right and 1% from bottom). I want you to change already uploaded images as well. You are working on a Development Website. I need to add this feature to the live version of the website. So please tell me, in which files you did the changes. It is important, that you do it either as Plugin, or in functions.php. Everything in the child theme!
I'll send you the login data in chat.