the DEFAULT function of # for a terminal window emulating a CRT ist hardcoded.
see Terminal I/O WRITE
"Issuing WRITE # to a CRT terminal clears the screen and sends the cursor to the home (0,0) position."
using a Mnemonic Definition you may supply the required escape sequence to cover your needs.
but instead of
WRITE # you may need to use
WRITE /TOP (just as an example)