diff --git a/docs.d/video-driver-script.sh b/demo.d/video-driver-script.sh
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diff --git a/docs.d/COMMANDS.md b/docs.d/EOTK-COMMAND-SYNTAX.md
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diff --git a/docs.d/TEMPLATES.md b/docs.d/TEMPLATES.md
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--- a/docs.d/TEMPLATES.md
+++ b/docs.d/TEMPLATES.md
@@ -231,6 +231,12 @@ eg: `%%IF %NUMDAEMONS% < 6`
 * `>`
 * `<`
 
+### File Operators
+
+eg: `%%IF exists templates.d/nginx-site-%ONION_ADDRESS%.conf`
+
+True if the (substituted) filename exists.
+
 ### String Operators
 
 eg: `%%IF %ONION% eq facebookcorewwwi`
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