update docs for automaterial

docs/plugins/automaterial.rst

@@ -1,33 +1,45 @@
 automaterial
 ============
-This makes building constructions (walls, floors, fortifications, etc) a little bit
-easier by saving you from having to trawl through long lists of materials each time
-you place one.
 
-Firstly, it moves the last used material for a given construction type to the top of
-the list, if there are any left. So if you build a wall with chalk blocks, the next
-time you place a wall the chalk blocks will be at the top of the list, regardless of
-distance (it only does this in "grouped" mode, as individual item lists could be huge).
-This should mean you can place most constructions without having to search for your
-preferred material type.
+Sorts building materials by recent usage. This makes building constructions
+(walls, floors, fortifications, etc) much easier by saving you from having to
+trawl through long lists of materials each time you place one.
+
+It moves the last used material for a given construction type to the top of the
+list, if there are any left. So if you build a wall with chalk blocks, the next
+time you place a wall the chalk blocks will be at the top of the list,
+regardless of distance (it only does this in "grouped" mode, as individual item
+lists could be huge). This means you can place most constructions without having
+to search for your preferred material type.
+
+Usage::
+
+    enable automaterial
 
 .. image:: ../images/automaterial-mat.png
 
-Pressing :kbd:`a` while highlighting any material will enable that material for "auto select"
-for this construction type. You can enable multiple materials as autoselect. Now the next
-time you place this type of construction, the plugin will automatically choose materials
-for you from the kinds you enabled. If there is enough to satisfy the whole placement,
-you won't be prompted with the material screen - the construction will be placed and you
-will be back in the construction menu as if you did it manually.
+Pressing :kbd:`a` while highlighting any material will enable that material for
+"auto select" for this construction type. You can enable multiple materials. Now
+the next time you place this type of construction, the plugin will automatically
+choose materials for you from the kinds you enabled. If there is enough to
+satisfy the whole placement, you won't be prompted with the material screen at
+all -- the construction will be placed and you will be back in the construction
+menu.
 
 When choosing the construction placement, you will see a couple of options:
 
 .. image:: ../images/automaterial-pos.png
 
-Use :kbd:`a` here to temporarily disable the material autoselection, e.g. if you need
-to go to the material selection screen so you can toggle some materials on or off.
+Use :kbd:`a` here to temporarily disable the material autoselection, e.g. if you
+need to go to the material selection screen so you can toggle some materials on
+or off.
+
+The other option (auto type selection, off by default) can be toggled on with
+:kbd:`t`. If you toggle this option on, instead of returning you to the main
+construction menu after selecting materials, it returns you back to this screen.
+If you use this along with several autoselect enabled materials, you should be
+able to place complex constructions more conveniently.
 
-The other option (auto type selection, off by default) can be toggled on with :kbd:`t`. If you
-toggle this option on, instead of returning you to the main construction menu after selecting
-materials, it returns you back to this screen. If you use this along with several autoselect
-enabled materials, you should be able to place complex constructions more conveniently.
+The ``automaterial`` plugin also enables extra contruction placement modes, such
+as designating areas larger than 10x10 and allowing you to designate hollow
+rectangles instead of the default filled ones.