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All, I am happy to announce that I am back in blogging on ExpressionFlow. I'm trying to cover more theoretical topics around visual programming and discuss new fresh approaches. I'd like to invite everyone to follow the blog and @expressionflow twitter account. url: http://expressionflow.com twitter: @expressionflow facebook: https://www.facebook.com/expressionflow Please let me know the kind of topics you'd like me to discuss. There's lots of cool topics on my mind already but I would love to hear from you, what would be something interesting for you all. Thanks, and happy Thanksgiving for everyone! Tomi

Especially as he marked his answer as Best Answer" to his own question. Now. Where are all my posts .

This code replaces the XNode with a SubVI and rewires it as before the change.(ReplaceSelf Ability) Trigger this function via SelectMenu (and BuildMenu) ReplaceSelf (SubVI from XNode and rewire) LV2011.zip

I worked on something much like this before, but never wound up fully finishing or using it. Here is code that is meant to be called in an event structure for a "mouse up" event in a Waveform Graph. It expects the control reference, the coordinates (both returned by the event) and a name to put on the annotation. See if this does what you want.

Here's a brief example how to draw your own images on plots. The VI simply tracks the x-location of the mouse and draws a circle around the corresponding data point. You could use whatever logic you want (closest Cartesian point, tracking multiple plots, whatever) and draw any info you'd like, but this should get you started if the built in functionality doesn't suffice. Mouse Tracking LV13.vi