Workspace tour : Using rulers, grids, and guides
 
Using rulers, grids, and guides
The Edit workspace displays the rulers by default. You can choose a ruler display in pixels, inches, or centimeters, change the color of the rulers, or altogether hide them.
What is a grid?
A grid is a series of horizontal and vertical lines overlaying your image. Grid lines can help you position image elements. You can display or hide grids and set grid preferences for spacing and appearance. When you display grids, they appear in all open image windows.
What are guides?
Guides are horizontal or vertical lines you position to overlay your image. With the rulers displayed, you drag guides onto your image to help with precision work, such as cropping, moving image elements, selections, as well as text and brushstroke placement. While grids place a series of horizontal and vertical lines at certain intervals, you place guides at the locations you want.
Setting snapping
You can use snapping to align your brushstrokes and image elements precisely to the nearest grid line or guide. The snap influence controls the distance, in pixels, that an element must be from a guide or grid line in order to snap to it. An item’s center point snaps to a guide or grid if the center point is the closest part of the item to a grid or guide.
To display the ruler, grid, or guides
Edit workspace 
Choose the View menu, and select one of the following:
Rulers
Grid
Guides
You must first display rulers before you can drag guidelines onto your image.
To set ruler properties
Edit workspace 
Manage workspace 
1 Choose File Preferences General Program Preferences.
The Preferences dialog box appears.
2 Choose Units from the list.
3 In the Rulers group box, choose an option from the Display Units drop-list.
4 Choose the ruler color by selecting one of the following options:
Black on white — displays black hash marks and numbers on a white background
Toolbar colors — displays black hash marks and numbers on a color background that is used in toolbars and palettes
5 Click OK.
To set default or current grid properties
Edit workspace 
1 Choose View Change Grid, Guide & Snap Properties.
The Grid, Guide & Snap Properties dialog box appears.
2 Click the Grid tab.
The Default settings group box shows the default settings for the grid. The Current image settings group box shows settings for the grid in the current image.
3 Type or set a value in the Horizontal grids control to set the distance between horizontal grid lines (starting from the top of the image).
4 Type or set a value in the Vertical grids control to set the distance between vertical grid lines (starting from the left side of the image).
5 Choose a unit of measurement option from the Units drop-list.
6 Click OK.
 
You can also
 
Choose a grid color
Click the Color box, and choose a color from the color palette.
Set the snap influence level
Type or set a value in the Snap influence control.
To place a horizontal or vertical guide
Edit workspace 
1 If the rulers are not displayed, choose View Rulers.
2 Choose View Guides.
3 Do one of the following:
To place a horizontal guide, click the top ruler, and drag a guide into position.
To place a vertical guide, click the left ruler, and drag a guide into position.
As you drag, the Status bar displays the guide’s position (in pixels).
4 For further placement position, on a ruler, double-click a guide handle.
The Guide Properties dialog box appears.
5 Type or set a value in the Guide position control.
6 Click OK.
To change the color of a guide
Edit workspace 
1 On a ruler, double-click a guide handle.
The Grid, Guide & Snap Properties dialog box appears.
2 On the Guides tab, click the Color box, and choose a color from the color palette.
3 Click OK.
To set the default properties for guides
Edit workspace 
1 Choose View Change Grid, Guide, and Snap Properties.
The Grid, Guide & Snap Properties dialog box appears.
2 Click the Guides tab.
The Default Settings group box shows the default settings for guides. The Current Image Settings group box shows settings for the guides in the current image.
3 In the Default Settings group box, click the Color box, and choose a color from the color palette.
If you want to choose a recently-used color, right-click the Color box, and choose a color from the Recent Colors dialog box.
4 Type or set a value in the Snap influence control to specify the distance (in pixels) that an item must be from the guide in order for it to snap.
5 Click OK.
Note: You must choose the Snap to Guide command in the View menu.
To delete guides from an image
Edit workspace 
1 Choose View Change Grid, Guide, & Snap Properties.
2 Click the Guides tab.
3 Mark the Delete guides check box.
4 Choose one of the following options:
From current image only
From all open images
5 Click OK.
You can also drag a guide’s handle until the guide is off the image area, or right-click a guide handle and click Delete in the Guide Properties dialog box.
To snap to the nearest guide or grid line
Edit workspace 
From the View menu, choose one of the following:
Snap to Guides
Snap to Grid