Epson TM-T20 Technical Reference Manual page 52

Delete the specified NV graphics data
Define the NV graphics data (raster format)
Print the specified NV graphics data
Transmit the key code list for defined downloaded graphics
Delete all downloaded graphics data
Delete the specified downloaded graphics data
Define the downloaded graphics data (raster format)
Print the specified downloaded graphics data
Store the graphics data in the print buffer (raster format)
Select bit-image mode
Define downloaded bit image
Print downloaded bit image
Define Windows BMP NV graphics data
Define Windows BMP download graphics data
Commands for status
Enable/disable Automatic Status Back (ASB)
Transmit status
Transmit real-time status
Commands for barcode
Print barcode
Set barcode height
Set barcode width
Select print position of HRI characters
Select font for HRI characters
Commands for two-dimensional codes
PDF417: Set the number of columns in the data region
PDF417: Set the number of rows
PDF417: Set the width of module
PDF417: Set the row height
PDF417: Set the error correction level
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