Vertical lines with legend

[jodes]

I want a long graph that is likely to be zoomed in on, such as those in the zooming examples. However, at various points along the X axis I will want vertical lines with an annotation/label on each.

Firstly, how could this be done?

Secondly, when I zoom in, I presume the label is likely to disappear – since the y values of the line graph will be within a smaller range, it will automatically zoom in on the y axis as well, so cropping the label?

[Sanjoy]

Are you looking for stripLines with label? If you want the interval not to change while zooming you can set interval yourself.

For the second case can you please create a jsfiddle and an image depicting the issue. So, that we can look into it and help you out.