The three buttons at the bottom of the working planes palette control how the working plane is viewed and how it interacts with certain tools and commands.
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Changes the view to be perpendicular to the working plane; similar to the Top view under the View menu in that you are looking straight at the working plane
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Sets the ground plane as the reference for tools such as the Flyover tool, Walkthrough tool, and other viewing tools; used with the Flyover tool’s rotation center mode
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Sets the working plane as the reference for tools such as the Flyover tool, Walkthrough tool, and other viewing tools; used with the Flyover tool’s rotation center mode
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