How can I limit workspace in 2D array graphic representation?

Hello,
I have an 2D array and I would like to visualize it as a 2D grayscale map. What function would be suitable for that? Also, I would like to give user to ability to limit the workspace by encircling the desired area with a mouse and removing the rest. Is it even possible? I know I can set the limitations in numeric controls and just "cut" the sides of my map but can it be done with a mouse?

(LabVIEW is a full featured programming envorinment, so everything is possible!)
As a display, I would recommend an intensity graph with a greyscale Z color ramp. You can use mouse events to interact with it and dynamically modify the displayed array data.
Another possibility would be a picture indicator.
LabVIEW Champion . Do more with less code and in less time .

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How can I limit workspace in 2D array graphic representation?

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