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 # Example 26: Modify OpticStudio Preferences 

 Last update: 16.07.2025 

Ex 26: A new system is opened with a user-specified OpticStudio.CFG configuration file. All available OpticStudio Preferences are modified and displayed.

```
Input:      None
<p>Output:     Console text
</p>
```

[C#](page_ex26_cs.xhtml)

[C++](page_ex26_cpp.xhtml)

[Matlab](page_ex26_m.xhtml)

[Python](page_ex26_py.xhtml)