Guides are non-printing lines that help you line up elements in your document, either horizontally or vertically. You can choose a Snap To command so that the guides behave like magnets: Objects you drag to positions that are close to a guide will snap into place along the guide when you release the mouse button.
1 Choose File > Open, and open the Montage.psd file in the Lesson12 folder.
2 Choose View > Rulers. A vertical ruler appears along the left side of the window and a horizontal ruler appears along the top of the window.
Note: If the ruler units are not inches, choose Edit > Preferences > Units & Rulers (Windows, Mac OS 9) or Photoshop > Preferences > Units & Rulers (Mac OS 10), and select Inches from the Rulers pop-up menu; then click OK.
3 Choose Window > Info to bring the Info palette forward in its palette group.
4 Drag from the horizontal ruler to the middle of the image window, watching the Info palette to see the Y coordinates as you drag. Release the mouse when Y = 3.000 inches. A blue guideline appears across the middle of the window.
5 Drag another guide from the vertical ruler to the middle of the image and release the mouse when X = 3.000 inches.
6 Choose View > Snap To > and make sure that the Guides command is checked, or select it now.
7 Choose View > Rulers to hide the rulers again. Snapping images into position
Your guides are in place, so now you're ready to arrange your four cropped images in the montage.
1 Choose File > Open Recent > Pears.jpg. The pears image opens in a separate image window.
3 Click the move tool anywhere in the pear image and drag from that image window to the larger Montage.jpg window, and release the mouse button.
4 Still using the move tool, drag the pears image into the upper left quadrant of the image so that its lower right corner snaps into place against the intersection of the two guides at the center of the window.
In the Layers palette, you'll notice that the pears image is on a new layer, Layer 1.
5 Choose Window > Documents > Pears.jpg to make it active again, and then close it, either by clicking the Close button or by choosing File > Close.
6 Repeat steps 1-5 for the three other cropped files, placing the leaves image in the upper right quadrant, the dandelion in the lower left quadrant, and the sand in the lower right quadrant. All the images should fit snugly against the intersection of the guides in the center of the window.
7 Choose View > Show > Guides to hide the guides.
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