One off-topic question, displaying the level of my ignorance: what does BUMP mean?
By posting anything to the thread, including just "BUMP", you bump the thread up to the top of a New Posts search.
Many (if not most) of the people on sites like this use the New Posts feature to organize how they view the site.
“Photography is a complex and fluid medium, and its many factors are not applied in simple sequence. Rather, the process may be likened to the art of the juggler in keeping many balls in the air at one time!”
Ansel Adams, from the introduction to The Negative - The New Ansel Adams Photography Series / Book 2