eba6f2a0_de___BlackBerry_Composer___6_0__Description
[Element] guides [Description] 
Guides are alignment tools that you can add wherever you need them, by dragging them from the horizontal or vertical rulers. To assist with alignment, you can specify that objects auto-align to the guides. When you create or move objects, they automatically align to a guide. You can show or hide the guides, select the auto-align option, or lock the guides to prevent you from accidentally moving them.
Project window and workspace - User Guide - BlackBerry Composer - 6.0