function clears the designated area or reverse the white/black dot pattern in the designated area
in the drawing area.
format [esc] xr; aaaa, bbbb, cccc, dddd, e [lf] [nul]
term aaaa: designated area start point x-coordinate
fixed as 4 digits (in 0.1 mm units)
bbbb: designated area start point y-coordinate
fixed as 4 digits (in 0.1 mm units)
cccc: designated area end point x-coordinate
fixed as 4 digits (in 0.1 mm units)
dddd: designated area end point y-coordinate
fixed as 4 digits (in 0.1 mm units)
e: type of clear
a: clears the contents in the designated area to zeros.
b: reverses the white/black dot pattern in the designated area.
explanation

(1) the result is the same even if the start and end point coordinates are reversed.
(2) the result is the same even if the start and end point coordinates are set to an upper right and a lower left points, respectively.
(3) the start and end coordinates of the designated area must be set within the effective print area set by the label size set command ([esc] d).

examples

10 print #1, esc$; ”xr; 0345, 0100, 0762, 0585, a”; lf$; nul$;
20 print #1, esc$; ”rc000; abc”; lf$; nul$;
30 print #1, esc$; ”rc001; def”; lf$; nul$;
40 print #1, esc$; ”xs; i, 0001, 0002c5000”; lf$: nul$;