Inspiro includes two small front-end extras that live together in the Customizer: a Back-to-Top button and a page-load Preloader. Both are off by default and each has its own colors.
Go to Appearance → Customize → Misc Options:

Check Enable Back-to-Top Button to add a floating button in the bottom corner of your site. It appears once the visitor scrolls down and returns them to the top of the page in one click — useful on long portfolio pages, blog archives, and one-page sites.
Two color controls appear once it’s enabled:
Pick colors with enough contrast against each other, and check the result over both light and dark sections of your pages.
Check Enable Preloader to show a spinner overlay while the page loads, then fade it out once everything is ready. It’s a good fit for image- and video-heavy sites, where it hides the moment before large media appears.
Its two controls are:
Setting the Preloader Background to match your site’s background usually gives the smoothest transition.
Tip: a preloader delays the moment visitors see anything, so it works best on sites with heavy hero media. If your pages already load quickly, leaving it off is usually the better choice.
See also: