TRAY 1 TYPE=ANY
TRAY 1 SIZE=ANY
The previous settings mean that the printer usually pulls paper from Tray 1 first unless it is empty or closed. If paper is not kept in Tray 1 all the time, or if Tray 1 is only used for manually feeding paper, keep the default setting of TRAY 1 TYPE=ANY and TRAY 1 SIZE=ANY on the Paper Handling menu.
TRAY 1 TYPE or SIZE= a type other than ANY
The previous setting means that the printer treats Tray 1 like the other tray. Instead of looking for paper in Tray 1 first, the printer pulls paper from the tray that matches the type and size settings selected from the software.
In the printer driver, paper can be selected from any tray (including Tray 1) by type, size, or source. To print by type and size of paper, see "Printing by type and size of paper (locking trays)" in the Use Guide.