Hi @wccwts, thanks for giving Ultra a try.
Menus
As @wpyogi kindly mentioned, Appearance > Menus is where you can create a custom menu and assign it to the theme’s primary menu position. For a little more on WordPress menus you can also check out:
https://en.support.wordpress.com/menus/
Ultra has the following menu positions on offer:
Top Bar Menu
Top Bar Social Menu
Primary Menu
Footer Social Menu
The social menus use Links (vs Pages) and will add an icon based on the social network you insert as your link. I unfortunately don’t yet have Ultra’s documentation up for this yet. But you can check the following link as the system is the same:
https://purothemes.com/documentation/puro-theme/social-menu/
(Other themes on www.remarpro.com like Stargazer use the same method).
Slider
Could you perhaps send some more info on the slider problem you’re facing?
Full width sliders are hard to get right. Using Meta Slider, what we’ve done for the demo is insert our text as an overlay layer. Once uploaded to the Media Library we’ve copied the overlay url into the Caption field available for each slide in Meta Slider. This allows the overlay image in our slider demo to not stretch while the background image does.