These describe the toggle buttons on Position Probe tab of the Probe Toolbox (View | Other Windows | Probe Toolbox):
Probe Readout toggle - This toggle button shows or hides the Probe Readouts window. You can easily resize or relocate this window. Most of the information on the Probe Readouts window is the same for all probe types. For details, see "Using the Probe Readouts Window" in the "Using Other Windows, Editors, and Tools" chapter of the PC-DMIS Core documentation.
Toggle Laser On / Off - This toggle button turns the laser on or off. It is only available for laser probes.
Initialize Probe - This button starts or initializes the laser. You can't do anything with the laser until it is initialized. This takes about 15 seconds. (This button appears on this tab for DCC configurations.)