Hello Alison,
Regarding the Homepage Top Section Post image there are two options; left(a bigger image(post one)) and right(4 smaller images(post two-post five)) which you can customize yourself. Go to Customizer>>Homepage Settings>> Homepage Top Section and select your desired options.
You can check here; https://www.styledthemes.com/documentation/pro-themes/styledmag-pro/
Can you locate the yellow bar you are referring to ?You can attach the screenshot.
Let us know.
Best Regards,
Bidur
