When adding an image to a rich text you can optionally specify an alternative text. See screenshot. Is there a way to make this field mandatory?
Not as far as I know. It’s a custom plugin in our open source code, so maybe you can look at it to see if you can customize it. But, afaict there are no built in override options.
Oh, wait, I see you mean SaaS. There is then no option to customize this.