I'm not sure I really understand your question, but I think all the settings you need for your older Tek scope are shown on the menus at the right side of the picture.
Trigger: falling ( negative slope )
Source: External, ( channel A )
Auto triggering
DC Coupling
5 volts per division
25uS time base.
With a bit of trigger adjustment ( take the scope off of Auto trigger ) you should see the same thing, except the waveforms will likely start at the first falling edge of the upper waveform.
By the way, the scope I use most often is older than your 2335, it's a 2235, militarized version. Digital is great, but does have its limitations sometimes too.