Pushing Limits – Grid Limits: Tuesday Tips With Dieter | AutoCAD Blog

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While it’s always exciting to push limits, this time, we’re
going to do this literally with the AutoCAD LIMITS
command.

AutoCAD Grid Limits

When the Limits feature was first introduced, its primary
purpose was to enforce a boundary for the drawing area and to
define a plotting area. With the advent of paper space layouts,
that role was diminished for many users. But there’s still an
incredibly useful interaction between the Limits feature and
the grid display in the drawing area.

Currently, turning on the grid for the entire drawing area is a
little overwhelming when I just want to work within an area as
represented by the rectangle below.

AutoCAD Grid Limits

However, when I set the limits to the opposite corners of the
rectangle, and then set the GRIDDISPLAY system variable to 2, I
get a fixed grid completely contained within the limits as
shown here.

AutoCAD Grid Limits

Incidentally, setting GRIDDISPLAY to 4 displays an adaptive
grid
that changes as you zoom in or out if that’s your
preference.

To move the grid to a different part of your drawing, you can
either redefine the limits or move the User Coordinate System
(UCS). For example, you might want to display the grid only in
a portion of a drawing such as in the floor plan shown here.

AutoCAD Grid Limits

My general recommendation is to move the UCS, which ensures
precise grid alignment, facilitates entering smaller coordinate
values, and also provides a way to rotate the grid.

Tip: Always set the desired limits when the
UCS is coincident with the World Coordinate System (WCS) and
use the origin point (0,0,0) as one corner of the limits before
moving the UCS.

But does the Limits feature work in 3D as well?

Glad you asked! Here’s what a grid looks like in a 3D view with
perspective turned on:

AutoCAD Grid Limits: 3D

When I model in 3D, I get vertigo if I don’t limit the
area covered by the grid. When the grid display is limited, it
serves as a handy visual cue for the location of the
construction plane, the XY plane of the UCS as shown.

AutoCAD Grid Limits: 3D

However, note that the LIMITS command was originally created
for 2D only, so it cannot be defined or redefined in a 3D
context. The key is to first set the limits when the UCS is
coincident with the World Coordinate System. This means that

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