In early versions of OpenLabyrinth, the InfoButton (wee blue “i” icon) always showed up at the bottom of the Node. You edit the contents for the InfoButton using the ‘Supplementary Info’ field in the Node Editor.
Now you can place the InfoButton symbol anywhere you like on the page. Just below the second editing panel for the supplementary info, you will see a wikiref style link something like this: [[INFO:1234]].
When played, this wikiref will show the InfoButton that will link to that secondary page for Node 1234.
Note that you can have this reference placed on a number of Nodes. You can also have more than one InfoButton placed on the same node. See this ‘Help and InfoButtons‘ case for an example of how this works.