fig-altYou can add alternative text to figures you create with code by adding the fig-alt chunk option, which works for Knitr, Jupyter, and Observable code chunks.
Here is an R/Knitr example.
```{r}
#| label: penguins-plot
#| warning: false
#| fig-alt: |
#| Scatterplot of penguin bill depth vs. length, colored by species.
#| The relationship is positive for each of the three species.
library(tidyverse)
library(palmerpenguins)
library(colorblindr)
ggplot(penguins,
aes(x = bill_length_mm, y = bill_depth_mm, color = species)) +
geom_point() +
scale_color_OkabeIto()
```
The resulting HTML is shown below. The alternative (alt) text is accessible to screen readers.
<img src="index_files/figure-html/penguins-plot-1.png" class="img-fluid" alt="Scatterplot of penguin bill depth vs. length, colored by species. The relationship is positive for each of the three species." width="672">Quarto chunk options:
Guidance for writing alt text: