Unable to click on the watermark button. I've been using it all morning and suddenly it's not working. I'm sure I've accidentally changed something but can't figure out what??
Could you please let me know the version of Lightroom installed on your computer?
Is the option for watermark grayed out in the export window?
Also try restarting Lightroom, and restart the comptuer once.
Try creating a new watermark with a different font and then check.
Is the File you're trying to export a video file?