Photoshop Tutorials - Using Grid, Guides and Rulers
Using Grid, Guides and Rulers
Guides are auxiliary lines used to align any elements in Photoshop. You can enable the guides by going to the View menu and checking the Rulers option. When this option is enabled, the rulers will appear on the top and left sides of the image window. Guides are "dragged" out of the rulers. You need to left-click the ruler and drag to the center of the image. When you will release the mouse button, a blue line will appear and that would be the Guide. If you will drag the guide out of the top ruler, it will be horizontal, if you drag it out of the ruler on the left side of the image the vertical ruler will appear.
Selections and other objects are snapped to the guides when they are close to them. Guides have several settings that can be found in View menu.
View > Show > Guides option shows/hides the guides. When it is turned on you can see the guides on your screen.
View > Snap to > Guides options enables/disables the snapping of the objects to the guides.
Lock Guides option locks the positions of the guides preventing them from being moved.
Clear Guides option removes all of the guides.
As you have probably figured out if it is possible to lock the guides then it is possible to move them. You are right, because the guides can be moved using the Move tool in Photoshop. To do this you will need to place the move tool over the guide and the move symbol to appear, and then you can press the mouse button and drag it until you will release the mouse button.
Clear Guides command removes all of the guides, but if you want to remove selected guide you can simply drag it back to the ruler.
Grid is a set of guides that form a grid. It is enabled by going to View > Show > Grid and you can enable snapping to it by selecting View > Snap to > Grid option.