Casio QT-6000 Training Manual page 110

[Notes]
1) Supported BMP files: Windows bitmap, 24 bit colour
2) Number of bitmap image: Maximum of 100 single key images
can be stored.
When the double size key is specified, it will be occupied two
single keys memory space.
If the quadruple size key is specified, it will be occupied four single
keys memory space.
FILE910 PGM data transfer via CF card
REF manual page 118
[CF card] - 2.Data Restore – Select "FILE910P.910" – YES – YES
BMP file Key assignment
PGM manual page 22
[PGM4] 1.Keyboard - 3.Key attribute – Picture – "Select picture" –
"Press assign key" - ESC
110