The screenshot will need to be added to a image or file hosting site then a link to the screenshot will need to be added to the forum.
A screenshot needs to be clear enough for the staff to check and read.
How to add a image to the forums.
Click on Image Icon
Choose appropriate option for image: Form computer for images on PC / phone or From URL for pics in a website.
When uploading from PC, some people may find that they need to use basic loader ( single image upload option ) as the main option ( multiple image upload ) will not work.