You can export Canvas X Draw documents to as a WebP format. WebP was developed by Google© to allow lossless and lossy compression for images being uploaded to the web. This format is useful as it allows you to save bandwidth by utilizing a smaller file size, potentially without sacrificing image quality.
Select which output type to optimize for:
Select your RGB channels quality type. Compression increases the closer you set the slider to Draft. This allows for a smaller file size, though also reduce the quality.
Alpha channel compression
This option is available if you selected the Mask checkbox in the Render Image dialog box. The Alpha channel compression checkbox will compress the mask and reduce the overall file size.
Alpha channel quality
Select your alpha channel quality type. Compression increases the closer you set the slider to Draft. This allows for a smaller file size, though also reduces the quality.