how to bulk watermark for 650 images

1. Switch Media page to list view
2. Screen Options (tab at the top right) -> Change “Number of items per page” to 650
3. Checked all the items (using the checkbox under Bulk Actions)
4. In the Bulk Actions dropdown, select Apply Watermark

Each image will be done one at a time via Ajax, so don’t navigate away from the page until it’s done.

If you have a large number of images you don’t want watermarked, use the filters to try and reduce the number of unwanted images. You can also use the browser console and a bit of javascript to check off the boxes you want.