@User just a note, since i have added some functions i have wrapped the ngspice backnannotation stuff into its

::ngspice

namespace, to avoid cluttering the global namespace. When sourcing the

ngspice_backannotate.tcl

, the annotator function binds itself to the '`Alt-a`' keybind. If however you want to call it from console the name is now

ngspice::annotate