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CHAPTER 3. STUDY OF CAD COMMANDS

3.1 UNITS

Every object created is measured in drawing units. The suitable unit should be decided prior to

drawing. Then drawings created at actual size with that convention. For example, a distance of one
drawing unit typically represents one millimeter, one centimeter, one inch, or one foot in real-

world units.

To set the units format and precision
Click the Application button, and click Drawing Units.

In the Drawing Units dialog box, under Length, select a unit format and precision. Click OK.

Command entry: UN

3.2 LIMITS

To enhance drawing speed and efficiency, you can display and snap to a rectangular grid. You can

also control its spacing, angle, and alignment.
Sets and controls the limits of the grid display in the current Model or layout tab.

Format Drawing Limits
Command entry: LIMITS

3.3 ZOOM

With the Realtime option of PAN, it is possible to pan dynamically by moving the pointing device.
PAN does not change the location or magnification of objects in the drawing; it changes only the

view. The magnification of a view can be changed by zooming in and out. ZOOM does not change

the absolute size of objects in the drawing; it changes only the magnification of the view. Use
ZOOM Previous to return quickly to the prior view.

To pan by dragging

1. Click View tab Navigate panel Pan

2. When the hand cursor appears, hold down the button on your pointing device as you move.
3. Press ENTER, press ESC, or right-click to exit.

Command entry: P
To zoom by dragging

1. Click View tab Navigate panel Zoom drop-down Realtime

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