How to Center Figure Caption in RMarkdown Word Output

Question

I cannot figure out how to center a figure caption in RMarkdown with MS Word output. I'm pointing the Markdown document to a reference Word template, and the figure captions in the template are correct. The problem is that RMarkdown doesn't know that the captions are supposed to be captions. It's treating them as just normal text.

---
title: "Title"
author: "Author"
date: "June 5, 2020"
output:
  bookdown::word_document2:
    fig_caption: yes
    reference_docx: Template.docx
subsubtitle: Test
subtitle: Subtitle
---

# My Plots

Sample Plot

{r pressure,fig.cap="Sample Caption", echo=FALSE}
plot(pressure)

How do I tell RMarkdown that "Sample Caption" is actually figure text and not just normal text?

Answer 1

Try specify fig.id = "pressure" and it should generate automatically numbered captions.