Concretely, the composite is rendered and the mark is applied to it, producing a flat watermarked deliverable while your layered original stays clean. You control the position, the size and the opacity, and the same settings are applied consistently across everything you upload.
Can I use my own logo, or only text?
+
Either. Upload a transparent PNG logo, or type text and choose the font, colour and opacity. A tiled repeat is available when one corner mark is too easy to crop away.
Does the file format affect how the watermark comes out?
+
It does. PSD is Photoshop native — layers, masks, adjustment layers and blend modes stay live and editable, which no flat image format can represent. That governs how cleanly a semi-transparent mark can be blended into the underlying content.
Anything specific to PSD worth knowing?
+
Yes — layers, masks and adjustment layers are live objects rather than pixels, so a tool either preserves them or composites them down — there is no middle option. It affects when in your workflow the mark should be applied.
Does a watermark actually protect my work?
+
It deters casual reuse and it credits you; it is not security. A corner mark can be cropped and a faint one can be painted out. If protection matters, a large semi-transparent mark across the subject is far harder to remove than a discreet one in a corner.
Should I watermark before or after resizing?
+
After. Watermark the final deliverable at its final size, so the mark stays legible and proportionate. Watermarking a master you will process again means the mark gets resampled and compressed along with everything else.
