Brother PT-9700PC - Manual (Page 26)

Precautions
Static commands are valid only in raster mode.
Example: To dynamically change the template selection number to 10
1) Switch to raster mode.
ESC i a 01h (1Bh 69h 61h 01h)
2) Select template number 10.
ESC i X n 2 01h 00h 0Ah
(1Bh 69h 58h 6Eh 32h 01h 00h 0Ah)
3) Dynamically enter the P-touch Template mode.