Blogging and linking to pictures is possible:

You probably want to put a picture from the gallery into an email or a blog ?

You have several options - try to cut and paste it with the watermark,(and break copyright law), or you can post a link and the thumbnail image - which when clicked brings you to the image in the gallery:

Linking to the Gallery: To link to your picture make a note of the Picture reference number - this can be usually seen at the end of the URL for your preview image and is usually listed under the image itself as the picture ref. i.e.:
http://antbliss.thirdlight.com/viewpicture.tlx?albumid=123932&pictureid=5398687

Here the picture reference ID is 5398687

Now use this URL to create a direct link to your image:
http://antbliss.thirdlight.com/viewpicture.tlx?pictureid=5398687

putting the image reference you want at the end to create your pictures URL. (the difference is that the album identifier in the code is removed).

Naturally you can put this into an email instead if you like to share with friends.

Combine the link with the Thumbnail to pull those into your Blog or webpage - so if you are looking at a thumbnail in a gallery - right click (if on a PC), select properties and select and copy the whole image URL: which looks a bit like this:
http://antbliss.thirdlight.com/pictures/antbliss/thumbnails/ca/96/1194381819-994c45bb8a243f68125fedba97714930-thumb-3.jpg

and you can of course embed the hyperlink (as explained above) to the actual photo on the gallery...