HAPPY IMGThe difference here is not just speed. It is whether the job is a one-off image edit or a system for a full set of files.
Single watermark workflow
Use Add Watermark to Image when:
- you only need to watermark one image
- placement needs custom adjustment
- the image is special enough to justify manual attention
Batch watermark workflow
Use Batch Watermark Images when:
- the watermark should repeat consistently
- the image set is large
- speed and uniform output matter more than one-off tuning
Quick rule
If each image needs individual judgment, stay single. If the set should behave like one branded system, go batch.