Hello,

I’m moving to using PGFPlotsX, for it’s suitability for producing good publication ready plots, and got following the PGFPlotsX.jl and PGFPlots documentation most that I need functioning.

However I got stuck in figuring out how to annotate a plot with a text to illustrate a specific point. I’d appreciate a hint on how to do that in a simple way (and would be nice to get that on the PGFPlotsX.jl examples).

Follows a minimum working example, however with the annotation missing:

```
using PGFPlotsX
x_in = range(-100/π, stop = 100.0/π, length = 100);
@pgf p = Axis({ xmin = x_in[1]
, xmax = x_in[end]
},
Plot({
color = "blue"
},
Table( x_in, @. abs(sin(x_in)/x_in) )
),
HLine({ dashed, blue }, 0.3),
VLine({ dashed, red }, -15.0),
#now I want to put a text somewhere, say "this is the red line", Howto?
)
```

Thanks in advance for your help,

Rob.