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You may find hard to use the Cursor Data Tool in data dense regions. To overcome this launch the Magnifier with the 
icon in the toolbar and move it to your area of interest in the plot. The magnifying glass can be moved and resized using the mouse, and the magnification scale on its left-hand side can also be adjusted. You can also zoom into areas of the map using the Zoom controls 
in the toolbar.
Enable the sidebar of the Display Window with the 
button and select the Data tab (and select the 'vis_temp' layer at the top if it is not yet selected). Now select the Metadata panel inside the tab. Here you will find some statistics about the data plotted and a histogram as well.
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