My images aren't the correct size or I'm seeing black bars in an image grid.
This is a common issue due to how WordPress handles image sizing. Luckily, it's easily fixed.
WordPress sizes your images when they are uploaded to your site. The theme will tell WordPress what size images it needs. However, if you've uploaded images while a previous theme was activated, then the images won't be sized properly to your new theme when you activate it.
The easy fix is to install and run the Regenerate Thumbnails Plugin to regenerate your thumbnails to the new size.
If you're still having issues after running this plugin, start a new topic on the support forum and we'd be glad to help!