A simple markdown file to test the behaviour of figure captions with knitrBootstrap and rmarkdown.

test-caption.Rmd

---
title: Caption test 
output:
  knitrBootstrap::bootstrap_document:
    fig_caption: true
    keep_md: true
  rmarkdown::html_document:
    fig_caption: true
    keep_md: true
    self_contained: false
---

Figure 1 is a figure without thumbnail.

```{r fig, fig.cap="**Figure 1:** caption", bootstrap.thumbnail=FALSE}
plot(1:10)
```

Figure 2 uses thumbnailing.

```{r fig2, fig.cap="**Figure 2:** caption", bootstrap.thumbnail=TRUE}
plot(10:1)
```

The third chunk generates two plots and prints them at the end.

```{r fig3, fig.cap="**Figure 3:** caption", bootstrap.thumbnail=TRUE, fig.show="hold"}
plot(10:1)
plot(1:10)
```

The final code chunk also produces two plots but prints them as they are generated.

```{r fig4, fig.cap="**Figure 4:** caption", bootstrap.thumbnail=TRUE}
plot(10:1)
plot(1:10)
```