Where is the "hide toolbar" button in Confluence page Edit mode on Cloud?

[Bruce Cannon]

Issue
When I last tried confluence, there was a chevron icon button on the far right of the toolbar when in edit mode, which hid the top and bottom toolbars and gave a lot more space for working.  

It's also described in this article: https://confluence.atlassian.com/conf54/confluence-user-s-guide/creating-content/using-the-editor 

I don't have such a button.  I'm using Confluence Cloud.

Questions

1. Do other Cloud users have this button?  
2. Can it be hidden or something?  Maybe that's why I can't see it.

[Takayuki Hirota]

I noticed that Confluence Server(5.10) doesn't have "hide toolbar"  button too.

I could not find any documentation about this change.

[AnnWorley]

It is gone from my Cloud instance as well. It is part of the infrastructure changes we are implementing to update the Cloud environment. Most of the features, like the CSV export, will be coming back once the updates are complete.

[Bruce Cannon]

Why is this still missing?  The narrower notebook screens get, the worse this broken feature impacts users.