In the process of learning to work with Drupal, and to test my site, I've added several users each with a different role (administrator,authenticated user,....). But a problem I created was that, as an example, I used the wrong 'user' when making a blog-entry.
I solved that by displaying the picture of the current user in a block.
Not that the creation of the block went smooth... It took me a day of trial and error. But this is how I did it finally, and how you can do it
- Download the views-module and learn to work with it. It's basically an extremely powerfull tool to make queries in your database. It produces pages, blocks... in different formats (lists, HTML, etc...). The help-section in the module should be sufficient to get you started.
- Create a block with user: picture as one of the fields
- filter the results with user: current
- Save the block
- Display the new-made block somewhere on your website
- Done