Using tools to precisely position objects
Several tools are available to help you precisely size, reshape, and position objects in Layout mode: the Inspector, rulers, grid, guides and dynamic guides, and screen stencils.
Related topics 
Selecting and working with objects on a layout
Arranging objects
Topics in this section
Using the Inspector to position objects
Using the rulers and grid
Using guides and dynamic guides
Sizing layouts for different devices
Showing text or field boundaries