# Settings （STG） - Interactive settings mode

BEHAVIOR is a behavior for using the configuration CUI with Interactive settings mode. The interface for configuration is done via serial port input/output, enabling interactive configuration using terminal software such as TWELITE STAGE/TeraTerm/screen.

{% hint style="info" %}
This BEHAVIOR uses `UART0` (`Serial`) internally. Input strings not used by the configuration behavior are put into a FIFO queue allocated in the configuration behavior, and `Serial` behaves as if it refers to this queue. Note that the internal behavior is different from the case where no BEHAVIOR is registered.
{% endhint %}

* [\<SET\_STD>](/latest_en/settings/stg_std.md)


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