# Blueprint basics
## Blueprint interface
To open an Odyssey Brush, you must double click on its thumbnail (either from the Content Browser or directly from the Brush Selector in ILIAD). If you open a new Odyssey Brush, you will get this window :
--------------
## Open a node
You can open nodes directly in the Blueprint grid with a right click :
You can also go to the "Window" menu and enable "Palette" to keep nodes aside. Nodes specific to Odyssey Brushes are into "Odyssey" categories.
--------------
## Comment
Once you created several nodes, you can select them and organise them in comments.
In "Details" panel, you will have the possibility to change options like color or font size.
--------------
## Compile & Save
Compile must be used to valid your Blueprint before testing your Odyssey Brush.
 Your Blueprint needs to be compiled.
 Your Blueprint has been compiled and works well.
 Click here to save the changes you brought to your Bluperint.
 Your Blueprint has some errors to fix. For more information, see Compiler Result panel.
Be careful : compiling won't save and saving won't compile. These are two different tasks.
Iliad User Documentation 
