Update manual to emphasize importance of checking/editing alt text

vignettes/manual.Rmd

@@ -22,9 +22,15 @@ This manual is a work in progress. In the meantime, please read the function doc
 
 ## Updating alternative text and captions
 
-When a plotting function (e.g., `plot_biomass()`, `table_indices()`, `exp_all_figs_tables()`) is run, placeholders within the plot's associated alternative text and captions are replaced with key quantities (see the [`asar` package's Accessibility vignette](https://nmfs-ost.github.io/asar/articles/accessibility_guide.html) and/or the [`satf::write_captions()` function](https://github.com/nmfs-ost/satf/blob/master/R/write_captions.R) for more details). As stated in the Accessibility vignette, *you should always check that these alternative texts and captions have been assembled correctly.*
+When a plotting function (e.g., `plot_biomass()`, `table_indices()`, `exp_all_figs_tables()`) is run, placeholders within the plot's associated alternative text and captions are replaced with key quantities (see the [`asar` package's Accessibility vignette](https://nmfs-ost.github.io/asar/articles/accessibility_guide.html) and/or the [`satf::write_captions()` function](https://github.com/nmfs-ost/satf/blob/master/R/write_captions.R) for more details).
 
-There are multiple reasons why you may want to edit these. For instance, maybe you entered an incorrect value for the units when running `plot_biomass()`. Maybe you need to add some extra information to the alternative text accurately describe the plot. In any case, here's what to do if you want to alter the alternative text and/or captions in `satf`, depending on what you wish to change:
+As stated in the [Accessibility vignette's "Your to-do list" section](https://nmfs-ost.github.io/asar/articles/accessibility_guide.html#your-to-do-list), **you should always:**
+
+**1. Check that these alternative texts and captions have been assembled correctly.**
+
+**2. Write the final component of each figure’s alt text.**
+
+Here's how to alter the alternative text and/or captions in `satf`, depending on what you wish to change:
 
 ### I want to add or remove text