# Operation Mode Parameters

You can change **operation mode parameter** values in the operation mode parameters section of the F10 dialog. There is a tab for each operation mode defined in your testplan.

{% hint style="info" %}
You need to load your [testplan](/ltt/documentation/ltt-gui-manual/teststand.md) before you can see and change operation mode parameters.
{% endhint %}

The operation mode parameters are [defined in your testplan](/ltt/documentation/ltt-gui-manual/teststand/operationmodes.md), so you cannot add or remove parameters here. In this dialog you only change the current values of those operation mode parameters.

{% hint style="info" %}
You can update operation mode parameters even if if testplan is already running.
{% endhint %}

![Operation Mode Parameter Compare](/files/aGfdZloMMEJp0bZidSSS)

[go to initial setup guide](/ltt/documentation/ltt-gui-manual/gettingstarted/initial-setup-guide.md#SETUP_GUIDE)


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.irs.systems/ltt/documentation/ltt-gui-manual/lttgui/dialogs/f10testparameterconfiguration/operationmodeparameters.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.