Image Not Found
 

I'm trying to upload an html file, css file, and cover image into Sigil. I have all 3 files in the same directory. I upload the html file, then under Styles choose "Add" and choose the file, then in Images I choose Add and choose the file. But when I run FlightCrew checker it complains that those files aren't in use for some reason. What am I missing?!

Add only inserts the image (font,stylesheet...) into the Book STRUCTURE (seen in the file browser list)
You need to PLACE the image 1 or more times onto pages. Use the Black 'Monitor' Icon

Not used is a only an advisory warning (thought some publishers will reject for any little thing)

Thanks!