Design the center first
Channel art is displayed across multiple aspect ratios. Keep essential identity, title and call-to-action content in the central safe region and let decorative imagery extend outward.
Use guides as a review layer
The preview models common viewport crops but cannot promise every device or future YouTube layout. Keep the editable source so the design can be revised.
Test logo and text contrast
A banner can be technically centered and still be unreadable. Check text against bright and dark parts of the image and avoid tiny typography.
Export without destroying the original
OpenFileTools creates a new local result and leaves the source file unchanged.