I just upgraded phone and reinstalled Nova Launcher. I inadvertently deleted the single page, customizable search bar on my home page. I don't want a persistent search bar. I can't get a single, customizable bar on my home page. I can add a single bar as a widget but it doesn't customize when I try and change the settings in Nova. Or I can add a customized but PERSISTENT search bar thru Nova. What am I missing? Thanks.
Add a search bar widget, but don't use the one supplied by Google Search (which is fixed-style) - instead, Nova itself offers the customizable one you're looking for, under Nova Launcher - Quick Search Bar.
This search bar shares its customization options with the persistent one, under Nova Settings - Desktop - Search bar.