image size

Hello, some of our users like to upload their 5 MB pictures directly from their smartphone to the forum and do not understand much about the handling and problems of big images. The actually configured limit is around 1 MB. Question: Is there any function available to reduce image size and...

How does the media gallery serve images in different sizes? both internally and externally (with link)? Does it make smaller images that can be fetched when possible or does it always load up the largest image?