I have a graphics object stored in variable g1 that was generated using ListLinePlot. It consists of data imported from a csv file and has some options setting like PlotRange, TicksStyle, AxesStyle and ImageSize.

Now I want to add some graphics primitives to it such as lines and rectangles.

So what I tried was

Show [ { g1, Graphics[{some primitives}] } ]

But nothing shows up. I tried it on a more simple plot - Plot[Sin[x],{x,-1,1}] - and I did manage to see the lines and rectangles.

I am also aware of the "down direction is minus y coordinate" issue.

Is there something I am missing here? Perhaps something about layers and object over object precedence?

I uploaded the notebook with g1.

Attachments:

g1 and graphics.nb