That's tedious to use in a situation with a very large number of transitions.
What I've done in PSpice is take a digital stimulus, say...
110000101011100010....and feed it thru a magic part that converts it to a pulse train with defined high and low level voltages, and defined rise/fall (all specified via parameter passing, avoiding tedious and error-prone manual value entries).
And it works even when the digital stream may be unpredictable, as in, for example, a delta modulator.
...Jim Thompson