Rviz click tool to set exploration boundary
I am trying use the frontier_exploration
node as documented on the ros wiki (note: I had a link to the wiki but couldn't post due to a lack of karma points). I have set everything up as per the instructions and have enabled visualization with a marker display in rviz. The wiki then say to:
use the "Click Point" tool to mark the exploration boundary.
It is at this point that I have come unstuck. It feels like a stupid question but I can't seem to find any documentation telling me how to select these points. The RViz User Guide doesn't seem to say anything on the matter. The closest that I can see is that it says that the Select tool supports single-point selection, but doesn't seem to offer any hint on how to use it. In any case it is not that clear that the Select tool is the right one.
The other rviz tools that I have are: Interact, Move Camera, Select, Focus Camera, Measure, 2D Pose Estimation, 2D Nav Goal, and Publish Point. I have tried various mouse clicking combinations with all these tools but nothing seems to do what I want. Maybe there some extra plugin package that I need to have installed?
In short, can anyone point me to instructions on how to set the frontier exploration boundary in rviz?