Emu XL-7 & MP-7 User's Group

Does anyone know whether it is possible in grid sequencing mode to
"tie" notes together? I want to represent the effect of holding a note
down, say for four increments of the grid. But filling up four spaces
on the grid simply triggers the note four times. I know I could do
this by real time record, but it would be more accurate (given my
level of skill anyway) if it could be done in the grid.
David