@julian Thank you for your answer, and yes, that could be where the problem comes from.
I have these plugins on : default composer, alignment, markdown, simple spoiler.
PS. But I don't have the "redactor plugin" if by that you mean a wysiwyg editor.
I think the following image tells more than I write..
@sharonyue is your browser window really short? Are you saying the minimum composer height is too tall to show content in that case? What kind of device are you on that has a window like this?
I am using 4K monitor with 300% scaling. I attached several images in the following:
It also explain that why I want to remove the fixed header in the head https://community.nodebb.org/topic/15256/layout-design-in-the-latest-nodebb