I just tried this, but it doesn't work for me.  And with Sessions -> 
Manage... I can't delete the original Default Session file.

On 2016-12-19 17:03:18 deloptes wrote:
> I didn't follow that much the discussion, so excuse me if I am repeating
> something already said.
>
> I use many sessions related to different work subjects in kate. I just
> tried open kate close/hide the document/file view, closed kate. After this
> I opened kate and the view was hidden as expected.
> The default session is a bit odd, so I stopped using default long time ago.
> I recommend using custom session. you can remove the default one after
> creating your own.
>
> regards