Düsseldorf Hbf (Düsseldorf / Dusseldorf)

The two dominant features of Düsseldorf Hbf, the city's main train station are:
(1) its huge entrance hall, and
(2) the wide passage way that leads from the entrance hall to the gleis/platforms/tracks that the trains depart from.

If you use the main entrance to Düsseldorf Hbf on Konrad-Adenauer-Platz, this main passage way will be directly ahead of you under the main departure board, or if you arrive by U-Bhan you will ascend* into this main passage way.

*There are also multiple sets of escalators and lifts that connect the U-Bahn station, which is located directly beneath Düsseldorf Hbf, to this central passage way in the station.

There are flights of stairs and escalators that connect the central passage way to the gleis/platforms/tracks.
You don’t have to use the stairs when departing or arriving by train.
If you have entered the passage way from the main passage way, the escalators leading up to the gleis/platforms will be on the right.

When arriving by train, you don’t have to follow the crowds that you will be using the stairs, you may have to walk passed the stairs to access the escalators.

There are also lifts on each gleis/platform at Düsseldorf Hbf that give access to/from the trains, but these lifts don’t connect the gleis/platforms to the main passage way.
If you need to use the lifts to access your train, then you will find them in a secondary passage way, parallel to the main passage way, so the lifts are out of sight from the main passage way.
There is a connecting passage way in the middle of the station that gives access to the secondary passage way that houses the lifts (and left luggage lockers)

When arriving by train, if you want/need to use the lift to descend from the gleis/platform into the station, you may need to walk passed the stairs/escalators to find it.

What can be confusing for first time visitors are the names used for Düsseldorf’s public transport network.
At Düsseldorf Hbf you will see signs pointing to the U-Bahn, but Düsseldorf doesn’t have underground metro trains, instead its U-Bahn is part of its tram* network.

A distinction is made (seems to be made, we’re still a tad confused) between the trams lines that have underground stops in the city centre – including that at Düsseldorf Hbf, and those that don’t.
These lines with underground stops begin with a U, but this network of U lines is also known as the Düsseldorf Stadtbahn.

The tram lines that don’t have underground stops form the city’s Straßenbahn network., so aren't part of the U-Bahn.

But isn’t as complicated as it seems, Düsseldorf ‘s public transport system is all operated by Rheinbahn, and tickets are interchangeable between any of the trams (U-Bhan or not) and the city’s buses.
So use its route planner to work out which lines to take and don’t be concerned about whether you will be taking the U-Bahn, Stadtbahn, Straßenbahn etc

*The U-bahn lines can be classified as a light rail network, but the trains look like trams (but we’ll stop there).