Hello Jola-vitpol-co-u, 

Welcome to the Community page, 

Could you please provide us with more information on what you are wanting to do exactly so we can help you further. 

On QB desktop version I can access all recently opened windows, as they are listed on the left side(in my QB).

The list works as shortcuts to recently viewed windows i.e. rapports, suppliers, etc.

I cannot see this in QB online

Hello Jola-vitpol-co-u, thanks for that information there is nothing like that in QBO, there's the audit log which shows what recent things have been done in the account, if you need multiple pages open at the same time, it would be a case of having to just duplicate the page so that you can have more than one page in the account open.  You can leave this as feedback within the main cogwheel.