using ready demo sites

Hi, already solved that problem myself. I have another problem. I made a page, set is as main page, added it into the menu from appearances – menus etc. but it does not show in the menu or in the front page at all (using one-page theme setting).

Another problem is that while i’m working on this site, i have a “under construction” plugin ON. When i try to put slider images as the main view for the site, it asks in the Theme Settings -> Intro -> Fullscreen slider -> choosing image -> “Add to coming soon page” in the place it should say “publish” or “choose” or something else?

I took the risk one of saying yes, however when i went to check the results to frontend, there was no fullscreen slider on the page at all? How can i set the slider as it is in the demosite https://demo3.pixflow.net/the-moon-clean/