How do you lock the paper tray into position for 8.5x11 paper for the OfficeJet Pro 9015e?

[AL098675]

The way the paper tray is made, you depress a little button under the paper to slide it from 8.5x14 legal size (where it will lock) to 8.5x11 letter size paper, but there appears to be no mechanism to lock the tray into place for letter size paper.

How do I lock the tray into letter position?

I am asking under this category because the tray not being fixed into letter sized position makes the paper slide around and become uneven in the tray, causing multiple pages to feed through--like 8-9 extra pages and the page that does print is split across 2 pages--because of the way the paper is grabbing from the tray. But my primary issue is that the tray will not lock into 8.5x11.

[sdcocon]

I originally replied with the same question but I would like to add more information.  I just bought this printer.  I find the drawer hard to open.  When I pull on it to open it, with what I think is excessive force, the paper size is changed from 8 1/2 x 11 to 8 1/2 x 14.  To return the paper size to 8 1/2 x 11 a small "button" on the bottom of the tray needs to be pushed.  The same button does not exist for 8 1/2 x 11.  I also find that I need to remove the output tray to more easily remove the paper tray.  This still does not stop the size from changing.  Also I need to remove the tray completely to load the paper.  This is because the leading edge of the drawer is curved to push the paper up and it has grooves in it which prevents the paper from sliding up the curve.

The manual does not show any of this.  It just shows the drawer being pulled partially out and paper being fed in with the drawer still in the printer.