MovePortTo
MovePortTo Change position of top-left corner of portRect
#include <Quickdraw.h> Quickdraw
void MovePortTo(leftGlobal, topGlobal );
short leftGlobal; position for left edge (global coordinates)
short topGlobal ; position for top (global coordinates)
MovePortTo re positions the portRect of the current GrafPort. It is used by
the Window Manager to reposition windows.
leftGlobal and . . .
topGlobal are the desired coordinates for the top and left fields of the
GrafPort's portRect.
Returns: none

Notes: This changes the position at which subsequent drawing will appear for the
active GrafPort. It effectively moves the active area of the GrafPort by
adding offsets to all fields of the portRect such that the top-left corner is
moved to the global coordinate pair leftGlobal , topGlobal . The height and
width of the portRect remain the same and the local coordinate system is not
changed.
As with PortSize, this does not affect other fields of the GrafPort;
drawing continues to be clipped to the intersection of portRect, visRgn, and
clipRgn.
Unlike SetOrigin, this has no effect on the local coordinate system. It
moves the port to a different part of the BitMap.