MakeStories has great box shadow configuration capabilities. Box-shadow is a bit different from drop shadow. Box Shadow basically fits the shape. Box-shadow uses the filter property while the drop-shadow uses the CSS drop-shadow property. You can check out the drop shadow configuration at https://hc.makestories.io/hc/en-us/articles/360025364411-Drop-Shadow-Configuration
Check out the video below to understand box-shadow configuration.