07-24-2019, 06:24 AM
There has never been a "tool" in the Gimp sense. There is a slider to adjust the opacity of the current layer (top of the Layers list).
IMHO if you want to watermark a couple thousands of pictures, the efficient way is to create the watermark image itself with partial opacity,
and then to batch- compose it over the image using the compose component of ImageMagick.
IMHO if you want to watermark a couple thousands of pictures, the efficient way is to create the watermark image itself with partial opacity,
and then to batch- compose it over the image using the compose component of ImageMagick.