Rulers and Guidelines
Rulers and Guidelines are used to accurately place layers, text, and objects.
To enable rulers:
Select View | Rulers from the main menu, or press Ctrl + T.
To customize ruler units of measurement:
Right-click a ruler and select a new unit of measurement from the context menu: "Inches", "Centimeters", "Pixels", and "Percent".
To draw guidelines:
With Rulers enabled, click a ruler and drag the guideline to a desired location on the image.
Enable the Move tool in the toolbar to move previously placed guidelines.
To enable snapping to guidelines:
Snap layers, objects, and text layers to guidelines for precise positioning. When snapping is enabled, move the edge of a layer near a guideline and it will snap to the guideline.
Select View | Snap to Guidelines from the main menu, or press Ctrl + Shift + G.
To remove guidelines:
Select View | Clear all Guidelines from the main menu, or press Ctrl + Shift + ;.
To lock guidelines in place:
Select View | Lock Guidelines from the main menu, or press Ctrl + Alt + ;.
To hide guidelines:
Select View | Hide Guidelines from the main menu, or press Ctrl + ;.
To set Rulers and Guidelines options, see Rulers and Guidelines Options.