Watermark Base URL

Sets a base URL for resolving relative watermark paths specified in the mark parameter.

mark-base (also accepted as markbase or mb) accepts a base URL string. When set, the value of mark is treated as a path relative to this base URL rather than as an absolute URL.

For example:

mark-base=https://assets.imgix.net/watermarks/&mark=logo.png

This resolves to https://assets.imgix.net/watermarks/logo.png as the watermark source, equivalent to setting mark=https://assets.imgix.net/watermarks/logo.png directly.

This is useful when you have multiple watermark images stored under a common path and want to avoid repeating the full base URL.