A Guide is a Red Line marker which is used as a reference to align and position objects on the design.
The sides and centers of Objects can snap to the Guide Lines.
Click on the Ruler around the design and drag toward the center to place a Guide.
Select the Guide and click Properties to edit the position or drag it where desired.
Applying the Guide to the Bottom Layer
Applying the Guide to the Top Layer
Guides and Auto Alignment
Guide Direction: Snapping Objects to the Bottom Layer
Guide Direction: Snapping Objects to the Top Layer
Guide: Remove a Guide
Guides Properties
Guides Toggle: Editor Tools
Guides: Trace
New Guide: Alignment Tab
New Guide From Ruler
New Guide in Relation to an Object: Alignment Tab
New Guide a Specified Distance From an Object: Alignment Tab
Guides Toggle: Editor Default Setting