1. Would it be possible to use the post full screen layout in pages?
2. How could the BM slider on home5 be continuous (loop)?
3. Would it be possible to remove the text for the menu icon and close menu item?
4. How can centralise an image in page builder?
1. It is not possible
2. There should be the loop on current version. Please try to update the Air theme and BM Slider plugin to latest version(how).
3. Please paste the custom css code to “Appearance > Customize : Additional CSS”
4. Put the single image module into fullwidth wrap, click “settings” of fullwidth wrap, set “Inner Wrap Width”.(like the demo)