Sorry, by window I meant page
"footer item" isn't working on all my pages.
Could you please delete all pages except „Home" and share this .muse file with us (Dropbox, CC Files, …)? Then we can have a look. You may follow there instructions: https://forums.adobe.com/docs/DOC-8652
The home page is the only one that works. Should I upload my whole muse file?
No, please don’t! Isolate one page, which shows your issue.
(I am checking many Muse sites a day, and if I always have to download heavy files, I have to spend more time on waiting than on assisting users. )
The white space is there, because you set it!
It is quite obvious, why your page has such a high footer area in some breakpoints.
All elements, which are not set to be a „Footer“ element, can’t touch or be inside the footer area.
Check the footer position in every breakpoint.
Additionally, you should really revise your layout:
Thanks for your reply! I will take a look at correcting my breakpoints in the next few days. Your right about too many breakpoints, will try deleting a few and test.