From 308c88f67eb2c058262a97d3aa0ef718beec713a Mon Sep 17 00:00:00 2001
From: Adam Mayer <phooky@gmail.com>
Date: Wed, 3 Jan 2018 16:52:53 -0500
Subject: [PATCH] document SP command

---
 docs/Apple 401 Plotter.md | 21 +++++++++++++++++++--
 1 file changed, 19 insertions(+), 2 deletions(-)

diff --git a/docs/Apple 401 Plotter.md b/docs/Apple 401 Plotter.md
index 6354b82..9f2993c 100644
--- a/docs/Apple 401 Plotter.md	
+++ b/docs/Apple 401 Plotter.md	
@@ -384,12 +384,29 @@ that it will literally write the error message out on the plotter.
 |  8 | Bad syntax       |
 | 16 | Pen would go outside window    | 
 
+### Size Paper (SP)
+
+```SPn```
+
+Sets the current paper size. This is essentially a preset "VP" command. The table below of
+drawing area sizes is approximate, based on measuring a rectangle drawn at the extent of the
+entire viewport.
+
+| n | measurement (in mm) |
+|---|---------------------|
+| 0 | 241 x 175           |
+| 1 | 178 x 240 |
+| 2 | 394 x 240 |
+| 3 | 282 x 280(?) |
+| 4 | 259 x 170 |
+| 5 | 171 x 280(?) |
+| 6 | 326 x 217 |
+| 7 | 218 x 142 |
+| 8 | 143 x 217 |
 
 ## Unknown commands
 
 PK - ??? - no params/arb (Not in user reference)
 
-SP - ??? - 1 param ??   Size Paper
-
 LF - ??? - 1 param ? 0-9  Letter Font