How to turn on alignment lines?

[pomme27 4]

I recently upgraded to Designer on macOS Mojave. In the previous version of Designer, when I would position an object (say, a rectangle) near another object, some temporary lines would appear to help me align the two objects. I think the lines were red, but they might have been green - haven’t used the software in a while. In the new version, the lines do not appear. Where do I find the “turn alignment lines on” setting?  Thx

[walt.farrell 1,664]

That's a function of Snapping (the magnet icon on the Toolbar, or View > Snapping Manager... from the menu).

[v_kyr 1,172]

See also the online help about "Design aids", namely:

• Snapping
• Dynamic guides
• etc.

[pomme27 4]

Thank you Walt and v_kyr