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diff --git a/docs/content/en/functions/strings/ToUpper.md b/docs/content/en/functions/strings/ToUpper.md
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+---
+title: strings.ToUpper
+linkTitle: upper
+description: Converts all characters in a string to uppercase
+categories: [functions]
+keywords: []
+menu:
+  docs:
+    parent: functions
+function:
+  aliases: [upper]
+  returnType: string
+  signatures: [strings.ToUpper INPUT]
+relatedFunctions:
+  - strings.FirstUpper
+  - strings.Title
+  - strings.ToLower
+  - strings.ToUpper
+aliases: [/functions/upper]
+---
+
+Note that `upper` can be applied in your templates in more than one way:
+
+```go-html-template
+{{ upper "BatMan" }} → "BATMAN"
+{{ "BatMan" | upper }} → "BATMAN"
+```