To edit the entire inner background of your design, click on the design background to open the inner background editor.
To change the color of your inner background, select a color from the color chooser. This will be applied to your entire inner background.
Click on Delete background to delete your entire design background for a transparent effect.
Search through the manual
A Quick Tour of Mail Designer 365
Advanced Design Techniques
Appendix: Compatibility
Appendix: Keyboard Shortcuts
Approval
Background
Blend Modes
Creative Tools
Exporting a Design to Campaign Monitor
Exporting a Design to Mailchimp
Graphics and Other Objects
HTML Export
Image Areas
Images
Layout Blocks
Optimizing your Template for Mobile
Plain Text
Preparing your Design for Sending
Preview your Design
Send via Mail Designer 365
Sharing your Designs
Tables
Teamwork
Text Styles
The Inbox View
Using Retina Images with your Design
Working with Links and Buttons
Working with Text