nodes:

• You can drag a node using the node header.
• You can delete a node by double clicking on node header.
• You can change title and content of a node by double clicking on content of node.
• You can change name of a node output by double clicking output name.
• You can hide/show content of a node by clicking on node input.

comments:

• You can change content of a comment by double clicking on content of comment.

text:

• /*marked text*/ is marked as marked text
• --tab is looks like "    tab"
• /// is looks like
  -
  that

other:

• You can drag the view with middle mouse button.
• Please remove all links from the node before removing the node, links just stupid, I'll fix it soon.