We just migrated from SP 2010 on premise to Office365 with Sharepoint Online.
One thing I was accustomed to doing was to insert a Content Editor on the same page as a list so I could add directions and information about the list. I would simply create a new list and then "edit page" and I could add another webpart above the list.
However in SPO I don't see any commands to enter page edit mode for lists.
How do I enter page-edit mode for lists in SPO?
Lists and libraries in SharePoint online are by default opened in so called "New experience" mode, which doesn't allow us to do page customizations. In order to edit the page and add the Content Editor web part to it you could switch to the classic mode (there is a link in the lower left corner of the page).
You can read more about switching between the list modes here.
Ah - in the List Settings > Advanced Settings section, there is a section for List Experience with choices for Default,New Experience or Classic Experience.
Classic Experience makes it look somewhat like SP 2010 with the Ribbon - it brings back the Ribbon!
If you change this to Class Experience then you will have the option for Edit Page for the List.
The javascript command to enter Page Layout Mode is simply this: ChangeLayoutMode(false); but it doesn't work in the "New Experience" mode. It only works if you set the list to Classic mode.
Now, after you change the list to Classic Mode you will no longer see List Settings in the gear-button dropdown. You'll have to click in the list to pop open the ribbon and use the List Settings button in the Ribbon. The whole experience is not very consistent.
However, there is one more caveat that I've found. If you switch to Classic Experience and add a webpart (such as a Content Editor) you cannot switch back to New Experience as long as there are extra webparts on the page. Even if you change the setting again in List Settings > Advanced Settings - it just won't change back; the setting will stay set the way you mark it, but the display won't change. I guess New Experience is not capable of displaying other webparts.
One more thing to add: Say you do want it back to New Experience - and say you go and delete those extra webparts. Even if you left the setting set to New Experience you still have to go and change it again to make it take effect now that you've removed the webparts.
Enjoy!
