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Setting your units
Follow these steps to set the linear and angular units that you want to use in your new drawing:
1 Click the Application button and then choose Units from the Drawing Utilities group.The Drawing Units dialog box appears, as shown in Figure 4-3.
2 Choose a linear unit type from the Length Type drop-down list.Choose the type of unit representation that’s appropriate for your work. Engineering and Architectural units are displayed in feet and inches; the other types of units aren’t tied to any particular unit of measurement. You decide whether each unit represents a millimeter, centimeter, meter, inch, foot, or something else. Your choice is much simpler if you’re working in metric: Choose Decimal units. AutoCAD can think in inches! If you’re using Engineering or Architectural units (feet and inches), AutoCAD interprets any distance or coordinate you enter as that many inches. You must use the ′ (apostrophe) character on your keyboard to indicate a number in feet instead of inches. Using the ″ symbol to indicate inches isn’t required but is acceptable.ssss1 Set your units here.