Featured Image Question

Hi, I'm trying to understand the various size suggestions in the theme instructions for the "featured image". - I am using the Clean Portfolio theme https://catchthemes.com/theme-instructions/clean-portfolio/#img-sizes (thanks this these is awesome so far!). - When I add a "featured image" inside of the post, it shows up above the post fine (similar to your Penguin example: https://catchthemes.com/blog/videos-blog/video-series-adding-featured-image-wordpress-postpage/ on your "How to set a featured image" video. - After doing so, I see the post preview has a cropped version of this larger Featured Image header. My Question: Is there a way to add two images? One for the post's featured header, and another for the Featured Content (the square image). -Or- is there a way to manually set the Featured Content image size? Looking for suggestions on how to make them all uniform. My Problem: I prefer to add text on top of the Featured Header image on my post. I'd like this text to be fully visible on the Featured Content thumbnail (homepage). Currently the image is being cropped. Thanks in advance for the help Catch Themes team!!