I have yet to change anything on my PRS-505. Also, if this has been discussed before, I offer my apologies.
Here's the idea:
Why not use the page numbers on the right to correspond roughly to where one would like to place a bookmark?
I'm thinking that the page button, in conjunction with another button, could be used for this. Then the bookmark icon would appear to the right of the screen (where the page number button is).
Is that a feasible idea?
I won't feel offended if this is a bad idea, or if it's already been discussed.
Don