Der Grundriss zeigt die Veranstaltungstechnik.

Because Grundriss is a masculine noun in German, so its nominative singular article is der.

• der Grundriss = the floor plan / layout

In German, grammatical gender has to be learned with each noun. It does not always match natural gender or English logic.

Here, die Veranstaltungstechnik is the direct object of the verb zeigt (shows), so it is in the accusative case.

The useful point is that feminine singular nouns use die in both:

• nominative: die Veranstaltungstechnik
• accusative: die Veranstaltungstechnik

So even though the case changes, the article looks the same.

In this sentence:

• Der Grundriss = subject
• zeigt = verb
• die Veranstaltungstechnik = direct object

There are two clues:

1. Word order: in a normal German main clause, the subject often comes first.
2. Case marking: der here is nominative masculine singular, which strongly suggests that Der Grundriss is the subject.

So the structure is:

• Der Grundriss = the floor plan
• zeigt = shows
• die Veranstaltungstechnik = the event technology / technical setup

Because German main clauses usually follow the V2 rule: the finite verb goes in the second position.

In this sentence:

• Position 1: Der Grundriss
• Position 2: zeigt
• Then the rest: die Veranstaltungstechnik

This is one of the most important patterns in German word order.

Because the subject Der Grundriss is third person singular (it), so the verb zeigen is conjugated as zeigt.

Present tense of zeigen:

• ich zeige
• du zeigst
• er/sie/es zeigt
• wir zeigen
• ihr zeigt
• sie/Sie zeigen

Since der Grundriss = he/it grammatically, German uses zeigt.

Because German very often forms compound nouns by joining words together.

Veranstaltungstechnik is made from:

• Veranstaltung = event
• Technik = technology / technical equipment / technical setup

The last part usually tells you the basic category of the noun. So Veranstaltungstechnik is a kind of Technik.

This is completely normal in German, even when the compound looks long to English speakers.

Because all nouns are capitalized in German.

So in this sentence:

• Der
• Grundriss
• zeigt
• die
• Veranstaltungstechnik

Only the nouns Grundriss and Veranstaltungstechnik are capitalized.

This is a standard rule in German, not something special about this sentence.

Grundriss is pronounced roughly like GROONT-riss.

A few helpful pronunciation notes:

• Gr as in English green, but with a German r
• u in Grund is like the vowel in put, but shorter and tenser
• riss rhymes roughly with English kiss

The spelling ss is standard modern German here. You may sometimes see the older spelling Grundriß in older texts, but today Grundriss is the normal form.

It is a masculine noun meaning something like a floor plan, layout, or plan view, depending on context.

It is also a compound:

• Grund
• Riss

But for learning purposes, it is best to treat Grundriss as one vocabulary item and memorize it with its article:

• der Grundriss

Its plural is:

• die Grundrisse

The basic meaning stays the same, but German word order can change for emphasis, as long as the finite verb stays in second position in a main clause.

For example, you could say:

• Die Veranstaltungstechnik zeigt der Grundriss.

This is grammatically possible, but it sounds marked or stylistically unusual in many contexts. The original sentence is the most neutral and natural:

• Der Grundriss zeigt die Veranstaltungstechnik.

Because the articles show the cases, German can sometimes move elements around more freely than English.

Usually, yes. zeigen commonly takes a direct object in the accusative:

• Der Grundriss zeigt die Veranstaltungstechnik.
• Das Bild zeigt einen Saal.
• Die Grafik zeigt den Verlauf.

It can also take an indirect object in some sentences:

• Ich zeige dir den Plan.

Here:

• dir = dative
• den Plan = accusative

But in your sentence, there is just one object, and it is accusative: die Veranstaltungstechnik.

German often uses the simple present tense where English might also use the present progressive.

So:

• Der Grundriss zeigt die Veranstaltungstechnik.

is a normal way to say that the floor plan shows the technical setup.

German does have ways to emphasize ongoing action, but they are much less common than the English is showing / is doing pattern. The simple present is the normal choice here.