# Document viewer

## General

General data is required for all portlets.

[General configuration](/6.12/development/flow-portal-2/portlets/common-configuration.md#general)

## Listeners

The portlet can listen to the following events:

* On Row Selection
* On Point Selection

<div align="left"><img src="/files/-M8tdKUq3o-yseWI9ODM" alt=""></div>

[Listeners configuration](/6.12/development/flow-portal-2/portlets/common-configuration.md#listeners)

## Data

### Data source

The portlet data source configuration enables the portlet to execute specified queries towards the chosen database connector to fetch data, or fetch data from a workflow.

* Database: uses a flow connector to retrieve data from a database
* Workflow: runs a workflow to retrieve data

[Data source configuration](/6.12/development/flow-portal-2/portlets/common-configuration.md#database-source)

[Workflow source configuration](/6.12/development/flow-portal-2/portlets/common-configuration.md#workflow-source)

### Presentation

Data: the content which is to be displayed

File name: the name of the file

<div align="left"><img src="/files/-M0rRoA2taa15E9fxCiE" alt=""></div>

## Style

Change the header text color and add a header stripe by configuring style.

[Style configuration](/6.12/development/flow-portal-2/portlets/common-configuration.md#style)


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# 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://help.novacuraflow.com/6.12/development/flow-portal-2/portlets/document-viewer.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.