Conventions

  The general conventions between and are the following:

• The windows are numbered  from 0 to 31. Each window receives a constant number. When you kill a window its number will be reused by a future window creation. See currentwindow() function (see §7.3.9 page ).
• The current window , is the window pointed at by the mouse, therefore the current edited window. All functions refer to the current window except those for selecting (see selectwindow() §7.3.9 page ) or killing a window (see killwindow() §7.3.9 page ).
• The first  character in a window is numbered 0 (see currentposition() §7.3.1 page , gotochar() §7.3.2 page  and thechar() §7.3.3 page ). This number is incremented for each following character (including newline) up to the end of the buffer.
• The  first line in a window is numbered 0 (see gotoline() §7.3.2 page  and currentline() §7.3.1 page ).
• In most cases there is no window redisplay during execution. Necessary redisplays are made when execution ends and recovers control, or when you call the redisplay function (see §7.3.8 page ).