Board Thread:Support Requests - Getting Technical/@comment-36451270-20191110114748/@comment-1038387-20191110120136

Galleries have a standard size (200px IIRC). Because that's the purpose of galleries. There are images that are thousands of px wide, you wouldn't want the default to be full size.

To edit the width of the images, add, where n is the desired width. However, as this is an absolute number, it will not look the same on all screen sizes.