The integration of Flickr and Picnik has just make things greater, now you can add watermarks to your Flickr photos inside your Flickr account. Here’s how you do it:

Adding watermarks to Flickr photo

1. 

   On any given photo, click Edit Photo button to start editing your photo. Picnik will now load, click OK if you are using Picnik for the first time.

2. Under Create Tab, click on the Text button.
3. Write a text watermark. Click Add. You can further customize the font type, style, size, color and opacity.
4. Your watermark will now on the photo. Drag to reposition wherever you like. Hit the Save button, fill up the necessary description and settings and your Flickr image now comes with a watermark whenever it’s displayed.

Just in case your photos aren’t stored in Flickr, PicMarkr is another free online service that does image watermarking.

Other Flickr Hacks

Here are some of Flickr photo hacks previously mentioned:

• Surf Flickr Photos Thumbnail View
• View Flickr Photos in Highest Resolution

via Labnol