set-frame-position

set-frame-position is a built-in function in `C source code'.

(set-frame-position FRAME XOFFSET YOFFSET)

Sets position of FRAME in pixels to XOFFSET by YOFFSET.
If FRAME is nil, the selected frame is used. XOFFSET and YOFFSET are
actually the position of the upper left corner of the frame. Negative
values for XOFFSET or YOFFSET are interpreted relative to the rightmost
or bottommost possible position (that stays within the screen).