It's currently not possible to copy & paste files in when writing a prompt (e.g. a screenshot), you have to save the file, select it for upload and then allow the prompt, it would be quicker to just allow copy/paste, especially for screenshots.
In addition file upload is only supported for Genius mode, but not for others like GPT4 which makes utilizing another mode impossible if Genius is not able to answer a question or give the right information.