Auto save question

Auto save question

One of the features I saw and like about Zoho sheet was the Auto save feature.

I have been working with a colleague remotely on a spreadsheet, but she had it open for 1 hour and it never autosaved once!

I thought I found a preference where you could say "Autosave every X minutes" but now I can't find it.  What am I missing?

Thanks,

Gee