HP 2700 - Manual (Page 51)

Loading tray 2
CAUTION To avoid jams, never open or remove a tray during printing.
1. Pull tray 2 out of the printer and remove any media.
2. Slide the output bin extension out from the bin.
3. Adjust the length guide until the arrow points to the size that you are loading.
ENWW Configuring trays 41