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references/script-variables.md

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+# Script Variables (2025.23)
+
+Source: `help-portal-82bbae6b7005482c87bfd59a91735b45.md`.
+
+## Types & scope
+- Global variables defined in Outline → Global Variables (String, Integer, Number, Boolean; arrays allowed).
+- Runtime scope across application; accessible from any script.
+- URL parameter support: prefix variable with `p_` to read from query string.
+
+## Usage
+- Read/write directly: `MyGlobalVar = "value";`
+- Use as dynamic text sources (see `text-widget.md`).
+- Use in filters, bindings, and calculations.
+
+## URL parameter pattern
+- `...?p_MyVar=North` sets global variable `MyVar` at startup.
+
+## Notes
+- Keep naming consistent; document variable intent in Outline description.
+