Line remaining - no action in window.

[AutoPulsesvk]

Hi. First of all, thanks for FL_chart - good job. I would like to ask:

1. Is there a simple solution that after leaving the chart window, the line and tooltips remain displayed?
2. Is there a simple solution for a common line for multiple windows placed below each other, so that tooltips are also displayed in each window?

I think of a solution via Vertical line. Do I have any better options?