Squashed 'docs/' changes from fdea5430f..0584815c8

0584815c8 Add a page about Pages methods (Next, Prev)
653dc8db5 Add note about default bgColor

git-subtree-dir: docs
git-subtree-split: 0584815c8a9ef49c9682b6468a9f2a1e9f05be46

diff --git a/content/en/content-management/image-processing/index.md b/content/en/content-management/image-processing/index.md
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@@ -133,6 +133,8 @@ You can set the background color to use with a 3 or 6 digit hex code starting wi
 
 For color codes, see https://www.google.com/search?q=color+picker
 
+**Note** that you also set a default background color to use, see [Image Processing Config](#image-processing-config).
+
 ### JPEG Quality
 Only relevant for JPEG images, values 1 to 100 inclusive, higher is better. Default is 75.
 

diff --git a/content/en/variables/pages.md b/content/en/variables/pages.md
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+---
+title: Pages Methods
+linktitle:
+description: Pages is the core page collection in Hugo and has many useful methods.
+date: 2019-10-20
+categories: [variables and params]
+keywords: [pages]
+draft: false
+menu:
+  docs:
+    title: "methods defined on a page collection"
+    parent: "variables"
+    weight: 21
+weight: 21
+sections_weight: 20
+aliases: [/pages]
+toc: true
+---
+
+Also see [List templates](/templates/lists) for an overview of sort methods.
+
+## .Next PAGE
+
+`.Next` and `.Prev` on `Pages` work similar to the methods with the same names on `.Page`, but are more flexible (and slightly slower) as they can be used on any page collection.
+
+`.Next` points **up** to the next page relative to the page sent in as the argument. Example: `{{with .Site.RegularPages.Next . }}{{.RelPermalink}}{{end}}`. Calling `.Next` with the first page in the collection returns `nil`. 
+
+## .Prev PAGE
+
+`.Prev` points **down** to the previous page relative to the page sent in as the argument. Example: `{{with .Site.RegularPages.Prev . }}{{.RelPermalink}}{{end}}`. Calling `.Prev` with the last page in the collection returns `nil`. 
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