In this autocad tutorial we will draw a plate with 4 hole at each corner.
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1. Open a new drawing. Click New 
2. Make sure Ortho mode is ON, (it ON when it glow in blue)
click the icon to turn it ON or OFF. (or press F8 to toggle)
3. Type z [Space bar], e [Space bar]. This will zoom extents your drawing area.
4. Activate rectangle command. Click Rectangle.
5. Specify first corner point of the rectangle at 0,0. Type 0,0 [Enter].
6. Move your cursor to right side and specify other corner point at 10,6. Type 10,6 [Enter].
7. Click OFFSET,
specify offset distance to 1. Type 1 and [Enter],
select rectangle edge as offset object,
point and click at inside of the rectangle to specify offset side.
The offset rectangle will look like this;
8. Press [Esc] key few times to end offset command. Click Circle,
Point and click at one of the rectangle endpoint as new circle center.
9. Specify radius for this circle to 0.5, type 0.5 [Enter].
10. Repeat step 8 and 9 to other 3 rectangle corner.
11. Click on inner rectangle edge
and press [Del]. Your sketch is done.
