max_len = Start_Col + Screen_Cols;
len = This_Col;
p = SL_Screen[This_Row - Start_Row].neew + len - Start_Col;
p = SL_Screen[This_Row - Start_Row].neew;
if (len > Start_Col) p += len - Start_Col;
prev = 0;
for (i = 0; i < n; i++, str) {