Watermark Y Position
mark-y
Defines the y-position of the watermark in relation to the top-most edge of the base image.
The value can be a positive or negative integer. If the value is negative, the image will be partially outside the base image boundary. The mark-y parameter will overwrite mark-align=top, mark-align=middle, mark-align=bottom, and mark-pad (in the vertical direction) if set. Use mark-y[N] to style a specific additional watermark layer — styles do not inherit across watermark layers.