Cannot find the unestimated items scheduling section

[Ariane Voorbeijtel Cannenburg]

I would like to know how the portfolio plan treats unestimated items. In the documentation I find the tekst below. But I do not have the mentioned "Unestimated item scheduling" section..?? We use the 3.8 version 

"By scheduling unestimated items using one of the following options, Portfolio for Jira can produce a more sensible schedule, even if you're just doing high-level planning of your work:

• Base on default estimates
• Base on target dates
• Custom
• Off

[Jan Kips]

I'm having the same problem, using v3.18. 

Workaround is to go back to the old planning interface.