Complete links to other packages

action-layout.Rmd

@@ -543,3 +543,11 @@ tags$p(
 Note the use of `inline = TRUE`; the `textOutput()` default is to produe a complete paragraph.
 
 To learn more about using HTML, CSS, and JavaScript to make compelling user interfaces, I highly recommend David Granjon's [Outstanding User Interfaces with Shiny](https://unleash-shiny.rinterface.com/index.html).
+
+## Summary
+
+This chapter has given you the tools you need to make complex and attractive Shiny apps.
+You've learned the Shiny functions that allow you to layout single- and multi page apps (like `fluidPage()` and `tabsetPanel()`) and how to customise the overall visual appearance themes.
+You've also learn a little bit about what's going on under the hood: you now know that Shiny uses Bootstrap, and that the input and output functions just return HTML, which you can also create yourself.
+
+In the next chapter you'll learn more about another important visual component of your app: graphics.

action-workflow.Rmd

@@ -822,5 +822,5 @@ These workflows might seem a little abstract and easy to dismiss because they're
 But I think of workflow as one of my "secret" powers: one of the reasons that I've been able to accomplish so much is that I devote time to analysing and improving my workflow.
 I highly encourage you to do the same!
 
-The next chapter on graphics is the first of a grab bag of useful techniques.
+The next chapter on layouts and themes is the first of a grab bag of useful techniques.
 There's no need to read in sequence; feel free to skip ahead to a chapter that you need for a current app.

action.Rmd

@@ -8,6 +8,8 @@ I think everyone should start with Chapter \@ref(workflow), because it gives you
 After that, there's no prescribed order and relatively few connections between the chapters: I'd suggest quickly skimming to get the lay of the land (and so you might remember these tools if related problems crop up in the future), and otherwise only deeply reading the bits that you currently need.
 Here's a quick run down of the main topics:
 
+-   Chapter \@ref(action-layout) details the various ways you can layout input and output components on a page, and how you can customise their appearance with themes.
+
 -   Chapter \@ref(action-graphics) shows you how to add direct interaction to your plot and how to display images generated in other ways.
 
 -   Chapter \@ref(action-feedback) covers a family of techniques (including inline errors, notifications, progress bars, and dialog boxes) for giving feedback to your users while you app runs.