What does "Tprint" mean in LTspice?
When in doubt, check the manual. In this case, under LTspice &gt; Dot Commands &gt; .TRAN:

  Syntax: .TRAN &lt;Tstep&gt; &lt;Tstop&gt; [Tstart [dTmax]] [modifiers]
          .TRAN &lt;Tstop&gt; [modifiers]
The first form is the traditional .tran SPICE command. Tstep is the plotting increment for the waveforms but is also used as an initial step-size guess. LTspice uses waveform compression, so this parameter is of little value and can be omitted or set to zero.

So it's mostly there for compatibility, since with or without waveform compression, the timestep is automatically chosen by the engine and the display of the waveform is done, also, automatically.