This is how a simple image in the Feature Top would look like.
That´s an alternative to the background-image of Feature Top and will be responsiv (adapt its height also).
Pro: Adapts to screensize while keeping its ratio, so takes up less space than a background pic with text on it probably.
Con: More complicated to get text placed on it. Will adapt until it reaches maximum (original) width, then (on larger screens) background will show up left and right.
Hint: Use the code the editor produces to insert an image in original size without a link somewhere on a test page. Refresh that page and inspect your source code to find that image. WordPress automatically includes responsive images in a few different sizes. When you copy that code from your source, you can save loading time on mobiles because smaller image sizes will be used there.
Copy that code. Use a textwidget, drag it in the Feature Top widget and paste the code in there. To avoid unwanted gaps around the image, I wrapped it in a div and added inline styles to the pic itself (style=”margin:0; padding:0;” – you can see that in the pic also).
Use a large image, but low in height. My original pics are 1920px wide. Important: Optimize before you upload or use a plugin that optimizes your pics while uploading, else your sites might load slow and large images might show up late. Without a plugin, visit this site to optimize large pics: https://tinypng.com/