Hi @JuliaL
Do these issues occur with other browsers and machines?
According to the image you shared, you are using Edge, please select the ellipses (…) in the upper-right corner of your Edge browser window, go to Settings > Appearance > Zoom
, check the page zoom settings.
I suggest you create a new file directly on OneDrive online: https://onedrive.live.com/login/ and check if you do it properly.
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