The Auto Alignment function will display bluealignment lines as an object is moved and lines up to another object in Designer,Traceand Nesting.
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Auto Alignment Definition
The Auto Alignmentfunction displays bluealignment lines as you move an object and it lines up to another object in Designer,Traceand Nesting, making aligning openings easier.
This can be toggled on/off in the Options menu for Designer and Trace.