Now that you’ve finished preparing the four images, you’ll place them together in a new composite image. Using guides, you’ll be able to align the images precisely without a lot of effort.
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.
Choose File > Open, and open the Montage.psd file in the Lesson 12 folder.
Choose View > Rulers. A vertical ruler appears along the left side of the window and a horizontal ruler appears along ...