it is almost the same with Power Rail Track. If you wan to insert your profile at a defined location, you can use Accusnap that gives you all snaps like in AutoCAD (object snap). BUT You must know that Power Rail Track is not using the "auto" snap whatever the setting is on the Accusnap toolbar. PRT is using "On demand" snap. It means you have to select the snap method on the toolbar then use CTRL+SHIFT to activate the snap when you want to use it. Another method is to use the tentative point. A typical and useful MicroStation way of selecting points (simultaneous left+right mouse click).
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