You can specify the drawing limits that form an invisible boundary around your drawing. You can use the drawing limits to make sure that you do not create a drawing larger than can fit on a specific sheet of paper when printed at a specific scale.
For example, if you plan to print your drawing at 1/8" = 1'-0" (in other words, using a scale factor of 96) on a sheet of paper measuring 36 inches x 24 inches, you can set drawing limits to 3,264 units wide (that is, 34 x 96) and 2,112 units high (22 x 96), which allows a 1-inch margin around the edges of the printed image.
To set the drawing limits
Choose Fomat > Drawing Limits.
Specify the x-coordinate and y-coordinate of the upper right drawing limit and the lower left drawing limit.You can also click Select to specify the drawing limits by selecting points in the drawing.
Command line LIMITS
LIMITS: Sets drawing limits and grid limits displaying area of current Model or layout tab
System Variables Reference