The new user header / footer personalization introduced at 02/may/2020 version is interesting.

I just would point that the head may use a large among of the vertical space in same display/smartphones. I would like to propose to be possible to add a logo.(png|jpeg|jpg|png) file to user-filedirectory to be incorporated at the left-top corner, as the image, if the file exist:

Also, the default text of header could be empty as the footer.