153     def fill_region (self, rs,cs, re,ce, ch=SPACE):  argument
158         rs = constrain (rs, 1, self.rows)
162         if rs > re:
163             rs, re = re, rs
166         for r in range (rs, re+1):
252     def get_region (self, rs,cs, re,ce):  argument
256         rs = constrain (rs, 1, self.rows)
260         if rs > re:
261             rs, re = re, rs
265         for r in range (rs, re+1):
353     def scroll_screen_rows (self, rs, re): # <ESC>[{start};{end}r  argument
356         self.scroll_row_start = rs