在使用 rmarkdown 生成的投影仪演示文稿中垂直居中对齐列的内容

Question

如何在`rmarkdown::beamer_presentation 中垂直居中对齐多列的内容？

正如对这个 SO 帖子的回答的评论中所建议的那样，我尝试过::: {.column width="30%"}，但这对我不起作用。

如果有一种简单的方法可以为每一列以不同的方式对齐内容，那也将非常有用（例如，c1：顶部，c2：中间，c3：底部，c4：中间）。

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---
output:
  bookdown::pdf_book:
    base_format: rmarkdown::beamer_presentation
    slide_level: 2
    keep_tex: true
---

## Figures in columns top-aligned
::: columns

:::: {.column width="30%"}
```{r top-p-5, echo=FALSE, out.width='30%'}
plot(pressure[1:5,])
```
::::

:::: {.column width="30%"}
```{r top-p-10, echo=FALSE, out.width='50%'}
plot(pressure[1:10,])
```
::::

:::: {.column width="30%"}
```{r top-p-all, echo=FALSE, out.width='100%'}
plot(pressure[1:nrow(pressure),])
```
::::

:::

## Figures in columns center-aligned (not working)
::: columns

::: {.column width="30%"}
```{r center-p-5, echo=FALSE, out.width='30%'}
plot(pressure[1:5,])
```
:::

::: {.column width="30%"}
```{r center-p-10, echo=FALSE, out.width='50%'}
plot(pressure[1:10,])
```
:::

::: {.column width="30%"}
```{r center-p-all, echo=FALSE, out.width='100%'}
plot(pressure[1:nrow(pressure),])
```
:::

:::

Answer 1

您可以使用:::: {.columns align=center}来获得中心对齐

---
output:
  bookdown::pdf_book:
    base_format: rmarkdown::beamer_presentation
    slide_level: 2
    keep_tex: true
---

## Figures in columns top-aligned
::: columns

:::: {.column width="30%"}
```{r top-p-5, echo=FALSE, out.width='30%'}
plot(pressure[1:5,])
```
::::

:::: {.column width="30%"}
```{r top-p-10, echo=FALSE, out.width='50%'}
plot(pressure[1:10,])
```
::::

:::: {.column width="30%"}
```{r top-p-all, echo=FALSE, out.width='100%'}
plot(pressure[1:nrow(pressure),])
```
::::

:::

## Figures in columns center-aligned (not working)
:::: {.columns align=center}

::: {.column width="30%"}
```{r center-p-5, echo=FALSE, out.width='30%'}
plot(pressure[1:5,])
```
:::

::: {.column width="30%"}
```{r center-p-10, echo=FALSE, out.width='50%'}
plot(pressure[1:10,])
```
:::

::: {.column width="30%"}
```{r center-p-all, echo=FALSE, out.width='100%'}
plot(pressure[1:nrow(pressure),])
```
:::

::::