Eighth Command <ESC>&f4X
The Macro Control command with a value of 4 enables
automatic overlay for the macro with the last specified ID.
That is, this command prints the macro.
Note that <ESC>&f2X and <ESC>&f3X will also work here.
Ninth Command <ESC>E
The Printer Reset command causes the printer to print and
eject the page. It also restores the User Default
Environment and deletes temporary fonts and macros.
Tenth Command <ESC>%-12345X
This PJL command causes the printer to exit the active
printer language and return control to PJL.
Eleventh Command ~@PJL DEFAULT DISKLOCK = ON <CR><LF>
This command sets the disk or flash memory to read-only.
In this state, it is not possible to format the disk, download
fonts or macros, or delete fonts or macros.
9-16 PJL File System Commands