How to draw vertical line in TeeChart?

I have a TeeChart (C#.NET) with 1-5 line series. Its X axis is type of DateTime, and Y is Double.

I want to draw vertical lines to mark interesting time positions, like start and end of sequences, but I can't find a method for drawing vertical lines. Am I just blind or do I need to detour?

Solution

There's ColorLine tool for that. You'll find examples at All Features\Welcome !\Tools\Color Line in the features demo, available at TeeChart's program group and more info at the TeeChart .NET tutorials, specifically at tutorial number 18.