I have a question related to LTSPICE. Some of the examples placed in Educational folder have this feature (i.e. when I press Run button, automatically some traces appear). I analyze example, but I don't find a command, an option or a directive able to make appearing trace automatically. Any idea?

  • \$\begingroup\$ Are you referring to the .plot command? \$\endgroup\$
    – PlasmaHH
    May 22, 2018 at 11:51
  • \$\begingroup\$ I am wondering this feature too, maybe because it labels the net out1, maybe it is already simulated... \$\endgroup\$
    – iouzzr
    May 22, 2018 at 12:31
  • 2
    \$\begingroup\$ Possible duplicate of Add a trace from a directive in LTSpice \$\endgroup\$
    – bitsmack
    May 22, 2018 at 18:06

1 Answer 1


After running the simulation, plot the desired waveforms, then activate the waveform viewer (click on its area), and then click on the Save button in the toolbar (or in the File > Save menu). This creates the .plt file. Whenever you first run the simulation, or when you open up the waveform, the saved traces will show up. This answer was also here.


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