How to add or remove drop shadowns from your Card Snippets
Click the RED COG icon found in the Row Tools top-left of the snippet
From the options that appear at the top of the popup - choose CARD
This will select the first Card found in the row.
Click the Pallete Icon, then click the QUICK PRESETS section.
Choose to enable or disable the BOX SHADOW OPTION.
This will change the setting for the first card. Click the arrows on the keyboard, or click the < > icons found under CARD to navigate to a different card and change the properties.