Autodesk 00308-011408-9F30A User Guide - Page 27

Grid Origin The grid origin is similar to the drawing origin in function and appearance. However, the grid origin serves as a reference point for grid coordinates only. By default the grid origin is located at the drawing coordinates 0,0, for example, at the drawing origin. You can move the grid origin of rectangular, circular, or isometric reference grids. For more information, see the chapter titled "Customizing the Grid," which begins on page 59. Drawing Scale Drawing scale is the ratio between the actual size of the entities in a drawing and their size on printed output. In conventional drafting, you scale the components of a drawing by using an architectural or engineering scale. In AutoSketch, you simply enter the actual (world) size of an entity and the software keeps track of the scale for you. You can also create "scaleless" 1:1 drawings in AutoSketch without regard for scale. Specifying a drawing scale, however, has two important benefits. It allows AutoSketch to accurately depict onscreen how your drawing will look on a printed page. And it allows you to specify entities such as text, markers, and dimensions by output size. This is usually more convenient than specifying such entities according to their size in relation to actual (world) entities. For information on how to change the drawing scale, see "Setting the Drawing Scale" on page 47. Layers Layers help you place entities together in logical groups. An architectural floor plan, for example, might contain a framing layer, a plumbing layer, an electrical layer, and so on. You can mask layers while working on others to remove distracting clutter and improve performance. Masked layers are not printed or displayed. You can also lock a layer to protect its contents from unintended change. For information on layers, see "Organizing With Layers" in online Help. Grid Origin | 17