Updated documentation

Author: RodZill4

material_maker/doc/images/node_editor_general.png

@@ -38,6 +38,7 @@ the new parameter. On this line:
 * the first text field is the name of the parameter, that will be used in the shader code
 * the second text field is an optional label that will be displayed in the user interface.
   There are a few tricks with this label that can help tweaking the UI.
+* the yellow document button can be used to add a tooltip to the parameter.
 * the option button can be used to select a type for the parameter. The available types
   are **float**, **size**, **enum**, **boolean**, **color** and **gradient**
 * on the right of the type selector, controls can be used to define a default value and
@@ -58,7 +59,9 @@ Inputs can be added and removed, have a name and a label (but no label trick) ju
 like parameters. they also have a type that can be **Greyscale**, **Color** or
 **RGBA**.
 Please note that Material Maker will convert automatically if you connect an input
-to an output of a different type.
+to an output of a different but compatible type.
+
+The yellow document button can be used to define a name and add a tooltip to the input.
 
 On the right of the input type, you must define a default value that will be used
 if the input is not connected. The default value is a GLSL expression that must
@@ -70,7 +73,7 @@ Blend filter and has a vertical and an horizontal gradient as default inputs).
 
 The "Function" checkbox changes the way the code is generated for this input.
 When set to true, the input is generated as a function and can be used in the *Instance
-functions* section. If the parameter is false, the input code is inlined. is is not advised
+functions* section. If the parameter is false, the input code is inlined. It is not advised
 to set this parameter to true when not required, because generating functions can have
 an impact on performance.
 
@@ -89,6 +92,8 @@ And generally, complex nodes mean complex output expressions. You may thus want
 write simple expressions in the **Outputs** tab and keep complex code in the 3
 remaining tabs.
 
+The yellow document button can be used to define a name and add a tooltip to the input.
+
 .. image:: images/node_editor_outputs.png
 	:align: center
 

material_maker/doc/images/node_editor_global.png

@@ -10,7 +10,8 @@ This will replace all selected nodes with a single subgraph node, without
 modifying the overall material description.
 
 When the subgraph is created, it is shown in the graph editor, and can be
-renamed using the top right text field.
+renamed using the top right text field. the yellow doc button next to this
+text field can be used to define the Group Node's tooltip.
 
 The subgraph node is not editable by default, but using the **Control+W**
 shortcut will make it possible to edit its contents using the pencil button.
@@ -25,9 +26,14 @@ The newly created subgraph contains:
   of the subgraph. Selecting them and using the **Control+W** shortcut makes them
   editable so the subgraph inputs and outputs can be added, removed, reordered,
   renamed or have their types modified.
+  Subgraph inputs and outputs can also be assigned tooltips (by clicking on the
+  yellow document button) and be associated to a port group (by clicking on the
+  blue circle button).
   Please note that all those operations will (when possible) keep connectivity
   inside and outside the subgraph.
 * A **Parameters** node that is a **remote** can be edited to expose selected
   parameters to the parent graph. When grouping nodes with a **remote**, the
   remote will automatically be used as **Parameters** node in the nealy created
   subgraph.
+  Remote parameters can also be assigned tooltips by clicking on the yellow
+  document button.

material_maker/doc/images/node_editor_outputs.png

@@ -216,7 +216,7 @@ The *Model* menu can be used to:
 * generate a mesh normal or inverse UV map (this option is only available for custom meshes)
 
 Selecting the *Custom* option in the model list will show a file dialog to select a
-3D model in Wavefront (.obj) format. The model should have UV information to correctly
+3D model in Wavefront .obj format. The model should have UV information to correctly
 display materials (normals will be generated if they are missing).
 
 When generating a map from a custom mesh, an image node for the generated map will
@@ -328,14 +328,22 @@ Edit menu
   Pasting also unselects all previously selected nodes and selects all newly created nodes,
   so they can easily be moved around.
 
+* *Load Selection* Loads a graph selection previously saved into a file
+
+* *Save Selection* Saves the current graph selection into a file
+
+* *Set Theme* is used to select the UI Theme
+
+* *Preferences* shows the *Preferences* dialog
+
 View menu
 ^^^^^^^^^
 
 * *Center view* Centers the current material graph view
 
 * *Reset zoom* Resets the zoom level of the current material graph view
 
-* the *Panes* submenu can be used to show or hide all side panels
+* the *Panels* submenu can be used to show or hide all side panels
 
 Tools menu
 ^^^^^^^^^^
@@ -359,6 +367,10 @@ Tools menu
 * *Export the nodes library* will prompt for a location on the disk and
   save the whole node library.
 
+* *Create a screenshot of the current graph*  will prompt for an image file name
+  on the disk and save a screenshot of the whole current graph (it will automatically
+  pan the graph to create the screenshot).
+
 Help menu
 ^^^^^^^^^