Larger marker for Handle - the handle function makes a tiny square marker which is hard to hit with the mouse. Make it easier to drag a handle without hitting the exact center of the marker.
New Window( "Example",
exx = 20,
exy = 50;
Graph Box(
Frame Size( 200, 200 ),
Handle(
exx,
exy,
exx = x;
exy = y;
);
Circle( {0, 0}, Sqrt( exx * exx + exy * exy ) );
);
);
the bottom edge of the square marker seems out-of-bounds.