You can change the background of each block individually, or throughout the entire project at once! A background is a canvas for you to have behind your added text, elements, or Media Frames on a block, and using combos of different backgrounds will give your video some nice visual variety When using Flexible Block Layouts, the Video Style you choose will change what additional block backgrounds are available.
Change the Background Color of the Entire Project
To change the background color setting, click on the Design tab at the top of the Workspace. You can select the color under the Video Settings tab. If you want different background options, you can choose a different Video Style under the Video Color selector.
Change the Background on One Block
To Choose a different background, click on the Change Background button on the top left of your Flexible Layout Block.
Some Video Styles, like Brush, will have both a Background color and an Accent color, whereas other styles only have the Background color to customize. Change the block color by clicking on the Drip icon.
Remember - you can always add in additional Elements to your block and choose a variety of different styles for your Media Frames if you want to mix and match. The background of your block is just one level of customization!