Using Snap and Grid

Grid and snap help you to draw fast and accurately. A grid is a set of evenly spaced, visible dots that serve as a visual distance reference. The grid also indicates how far the drawing limits extend. The snap feature creates a set of evenly spaced, invisible magnetic points, which make the crosshairs move in even increments. Both grid and snap are like the intersection points of the lines on a piece of grid paper. Grid points are for visual reference only and they do not print. Snap constrains the points that you can pick with the mouse.

• Both snap and grid can be toggled on/off separately, giving you the opportunity to display the grid points, while snap is not active and vice versa.

• Both snap and grid can be set differently in each viewport.

• In each viewport you can rotate the grid using the Snap Angle setting.

Isometric Snap and Grid

You can use the Isometric snap and grid option to create two-dimensional isometric drawings. With the isometric option, you can draw a simulated three-dimensional view on a two-dimensional plane, much the same as you might draw on a piece of paper. Do not confuse isometric drawings with three-dimensional drawings.

The isometric option always uses one of three preset planes, which are denoted as Left, Right  and Top. You cannot alter the arrangement of these planes. If the Snap Angle is 0, the three isometric axes are 30 degrees, 90 degrees, and 150 degrees.

When you set the Snap Style setting to Isometric Snap and then set the Snap Isometric Pair setting to Left, Top or Right, the snap intervals, grid, and crosshairs align with the selected plane. The grid is always shown as isometric and uses y-coordinates to calculate the grid spacing. If the Orthogonal Mode is active, the movement of the crosshairs is constrained to the current isometric plane.

Display the Snap and Grid settings

Do one of the following to display the Snap/Grid settings in the Settings dialog:

• In the Status Bar, right click on the Snap field, then choose Settings in the context menu.
  
  

• Open the Settings dialog, then click the Drawings button.
  Under Drafting, expand Coordinate Input and Snap/Grid.

Defining snap and grid spacing

1. Display the Snap/Grid settings in the Settings dialog:
    

2. Set the Reference Grid in the current viewport:

3. Expand the Grid Unit variable.

4. Type a value in the X and Y fields
   

3. Set the Snap Spacing:

4. Expand the Snap Unit variable.

5. Type a value in the X and Y fields
   

4. Close the System Variables dialog window.

5. If the Grid display is not turned on yet, do one of the following:

6. Double click the GRID field () in the Status Bar.

7. Click the Grid tool () on the Settings toolbar.

6. If Snap is not turned on yet, do one of the following:

7. Double click the SNAP field () in the Status Bar.

8. Click the Snap tool () on the Settings toolbar.

Setting the drawing Limits

1. Do one of the following:

2. Click the Drawing Limits tool button () on the Settings toolbar.

3. Choose Drawing Limits in the Settings menu.

4. Type limits in the command bar, then press Enter.

The command bar reads: Limits are off: ON/<Lower left corner> <x,y>:

2. Do one of the following:

3. Press Enter to accept the current lower left corner.

4. Specify the lower left corner of the drawing limits.

The command bar reads: Upper right corner <x,y>:

3. Do one of the following:

4. Press Enter to accept the current upper right corner.

5. Specify the upper right corner of the drawing limits.

Command Options

Using Isometric Snap

1. Display the Snap/Grid settings in the Settings dialog:
   
   

2. Turn on the Orthogonal Mode.

3. Set the Snap Style setting to Isometric Snap.

4. In Snap isometric pair, set the appropriate drawing plane: Top, Left or Right.
   

Setting the Snap Angle

1. Display the Snap/Grid settings in the Settings dialog:

2. Select the Snap Angle setting.

3. Type a new value in the Snap Angle setting field.

4. Close the Settings dialog.