diff --git a/GUI,-CLI-and-Formats-explained.md b/GUI,-CLI-and-Formats-explained.md
index 3c1f123..855b0c0 100644
--- a/GUI,-CLI-and-Formats-explained.md
+++ b/GUI,-CLI-and-Formats-explained.md
@@ -200,9 +200,9 @@ dotnet DiscordChatExporter.Cli.dll export -t "mfa.Ifrn" -c 53555 -f Json
 ```
 
 ### Changing the output filename
-You can change the filename by using `-o name`.
+You can change the filename by using `-o name.EXTENSION`. e.g. for the html format
 ```powershell
-dotnet DiscordChatExporter.Cli.dll export -t "mfa.Ifrn" -c 53555 -o myserver
+dotnet DiscordChatExporter.Cli.dll export -t "mfa.Ifrn" -c 53555 -o myserver.html
 ```
 
 ### Changing the output directory
@@ -213,10 +213,10 @@ dotnet DiscordChatExporter.Cli.dll export -t "mfa.Ifrn" -c 53555 -o "C:\Discord
 ```
 
 ### Changing the filename and output directory
-You can change both the filename and export directory by using `-o directory\name`.  
+You can change both the filename and export directory by using `-o directory\name.EXTENSION`. 
 If any of the folders in the path has a space in its name, add quotes (").
 ```powershell
-dotnet DiscordChatExporter.Cli.dll export -t "mfa.Ifrn" -c 53555 -o "C:\Discord Exports\myserver"
+dotnet DiscordChatExporter.Cli.dll export -t "mfa.Ifrn" -c 53555 -o "C:\Discord Exports\myserver.html"
 ```
 
 ### Generating the filename and output directory dynamically