How to configure all figures and text in my slides to be centered both vertically and horizontally by default?

[stefaniecg]

Description

A simple example which aligns all content to the top left corner of all slides.
I want all my slides to allways center all vertically and horizontally always.

---
title: Presentation
author: Me
format: revealjs
---

## Title 1

- item 1
- item 2

## Title 2

![an image](https://quarto.org/quarto.png)

[mcanouil]

See:

• quarto revealjs presentations vertically center content in columns #1386
• Vertically and horizontally centered content in slides (revealjs) #2951