Use the Read Waveform from File VI to read waveforms from a file. After you read a single waveform, you can add or edit waveform data components with the Build Waveform function, or you can extract waveform attributes with the Get Waveform Attribute function.
The following VI reads a waveform from a file, edits the t0 component of the waveform, and plots the edited waveform to a graph.

The Read Waveform from File VI also reads multiple waveforms from a file. The VI returns an array of waveform data, which you can display in a multiplot graph. If you want to access a single waveform from a file, you must index the array of waveform data, as shown in the following block diagram. The VI accesses a file that includes multiple waveforms. The Index Array function reads the first and third waveforms in the file and plots them on two separate waveform graphs.

You also can use the Storage VIs or the Read From Measurement File Express VI to read waveforms from a file.