Thank you for your answer and sorry for being unclear.
When I write a new page, save it, change the sidebar to ” full screen” as in your tutorial and then prewiev the page as an administrator there is some options at the top of the page, ” new” is one of them, where I can create new post, page etc. instead of “new” sometime it says “Ozw”.So sometimes my slider shows but suddenly it is gone and I refrech the site a couple of times and then that “Ozw” shows and my slider is gone.
Also when I return to “Edit the page” the sidbar is gone in “Full screen”.
I have Swedish as language in wp and have done no translation in the theme, after my new installation I have no plugin, hope this made things a bit easier to understand
Best regards
Anders