![]() ![]() Right click on the grid or grid snap tools to change their settings. There is also a grid snap tool (F9), which allows snapping to the grid. The F7 key is a quick way to toggle the grid on and off. Some people like the grid on in order to facilitate counting along the x and y axis. ![]() In the status bar at the bottom of AutoCAD, there is a grid that can be turned on or off. Conventionally, the y-axis is vertical, with positive numbers signifying a move up, and negative numbers signifying a move down.Conventionally, the x-axis is horizontal, with positive number signifying a move to the right, and a negative number signifying a move to the left.Any point along the floor can be given as (x, y), where x is a distance along the x-axis, and y is a distance along the y-axis. If you imagine the y-stub extending out indefinitely, this is the y-axis. If you imagine the x-stub extending out indefinitely, this is the x-axis. The place where the stubs intersect is called the origin. The z-direction is hidden if you are working in 2D, but you can think of it as coming out of the page (or monitor, I suppose). It is composed of stubs sticking out in the x-direction, the y-direction, and, the z-direction. ![]() In this example, the floor is a coordinate plane. It occurred to him that he could describe the fly’s location floor by noting its distance from two of the walls. One day Descartes was staring at a fly on the floor. The word “Cartesian” comes from the philosopher Descartes, who came up with the idea. It helps to take our time to understand the underlying concepts. Using coordinates to specify locations can be a challenge in AutoCAD. ![]()
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