The Online Histogram Presenter start by clicking on the button "OHP" on the DAQ Panel . Make sure you are using the muon configuration as specified here. Once the tool is open, you can:

• Navigate between the muon sub-detectors by clicking on the corresponding item in the left hand side column "Plugins", and ticking the box "XXXGlobalView".
• Navigate between groups of histograms by selecting the corresponding tab.
• Enlarge a histogram by double clicking on it, this will open the histogram in a separate pop-up window. Note that the new window usually starts "minimized", ie appears only in the bottom menu bar of opened windows on your desk, click on it there to display it.
• Zoom, change scale, etc. of a histogram via left and right mouse click operations, the OHP histograms are root objects.
  

(See on Trouble Shooting if the histograms are missing)