# Navigating data flows When you open a data flow, it opens in Data flow. Data flow provides both information on the flow and its dependencies as well as an editor for designing the flow. Data flow contains two sections: * Overview: Provides a summary of information about the data flow, including information on dependencies, reload history, and published copies. * Editor: Provides the canvas for designing and editing the data flow, previewing the script, and running the flow in full. ## Overview Overview provides general information about a data flow, its data sources, and its exported files. Four tabs are available in a data flow overview: * Summary * Notifications * Run history * Published copies ![Overview page of a data flow](https://help.qlik.com/en-US/cloud-services/Subsystems/Hub/Content/Resources/Images/Dataflow/data_flow_overview.png) ### Summary The Summary provides general information on the data flow creation, updates and status: * Owner: Owner of the data flow * Creator: Creator of the data flow * Contributors: Number of contributors to the data flow. Click the Users icon to view the names of contributors. * Space: Space where the data flow is located * Created date: Date the data flow was created * Modified date: Date the data flow was last modified * Last modified by: User who last modified the data flow * Last run status: Status of the last data flow run * Last run duration: Duration of the last data flow run * Last run date: Date of the last data flow run * Data flow ID: Technical ID of the data flow Summary also has two additional sections, Outputs and Inputs: * Outputs shows the files outputted by the data flow. View the full impact analysis for your data flow by clicking Open Impact Analysis. * Inputs lists all sources used at the start of your data flow. View the full lineage of your data flow by clicking Open Lineage. For items listed in Outputs and Inputs, click the More icon to view additional options. You can view the impact analysis or lineage for each item. You can also open items in a new tab. ### Notifications Notifications lists the different events for which you can receive notifications. You can turn them on or off, and select how you receive the notifications. ![Notifications settings panel for a data flow](https://help.qlik.com/en-US/cloud-services/Subsystems/Hub/Content/Resources/Images/Dataflow/data_flow_notifications.png) ### Run history Run history shows list of the previous data flow runs, with the status, time and duration of the run. Click View to display a summary and optionally download a detailed log. ![Run history page of a data flow with different statuses](https://help.qlik.com/en-US/cloud-services/Subsystems/Hub/Content/Resources/Images/Dataflow/data_flow_run_history.png) ### Published copies Published copies shows in which managed spaces copies of the data flow were published. Each copy shows the following information: * Name * Owner * Last modified * Space * Viewed by ![List of published copies of a data flow](https://help.qlik.com/en-US/cloud-services/Subsystems/Hub/Content/Resources/Images/Dataflow/data_flow_published_copies.png) Click on the copy to open it in Data flow. Click the More icon to view additional options. You can: * Add it to a collection. * Rename it. * View lineage information. * View impact analysis. * View the copy run schedule. * Open it in a new tab. * Delete the copy. ## Editor In Editor, you can design and run your data flow by combining data sources, processors, and targets. ![An empty data flow](https://help.qlik.com/en-US/cloud-services/Subsystems/Hub/Content/Resources/Images/Dataflow/data_flow_empty.png) Actions and panels available in the data flow editor: | Option | Description | | --- | --- | | the Assets icon | Show or hide the Sources, Processors and Targets panels. | | Flow status | Current validity status of the entire data flow (requires at least one node on the canvas). This status is the result of the statuses of all the components in your data flow. | | the More icon | Undo the latest change (multiple step undo is possible). | | the More icon | Redo the latest undo. | | the Properties icon | Show or hide the properties panel where you can configure nodes. | | the Run flow icon | Run the data flow to generate outputs. | | the More actions icon | Display additional actions such as showing the keyboard Shortcuts. | | the More icon | Zoom in on the canvas. | | the More icon | Zoom out of the canvas. | | the More icon | Center all flow components on the canvas. | | the More icon | Automatically arrange and align flow components on the canvas. | | the Preview script icon | Look at the end-to-end script generated by the data flow. | | the Preview icon | Show or hide the Preview panel where you can look at a live script and data sample preview. | List of keyboard shortcuts: | Keyboard shortcut | Action | | --- | --- | | CTRL + Z | Undo | | CTRL + SHIFT + Z | Redo | | CTRL + ENTER | Run flow | | CTRL + + | Zoom in | | CTRL + - | Zoom out | ### Assets The Assets panel contains all the components that can be added to the canvas to build your data flow. These components are split into three categories: * Sources that contain the data you want to prepare. See [Selecting a source](https://help.qlik.com/en-US/cloud-services/Subsystems/Hub/Content/Sense_Hub/DataFlow/Creating-data-flow.htm#Selecting_source) for more information. * Processors that contain the preparation functions to apply on the data. See [Adding processors](https://help.qlik.com/en-US/cloud-services/Subsystems/Hub/Content/Sense_Hub/DataFlow/Creating-data-flow.htm#Adding) for more information. * Targets to choose how to export the prepared data. See [Selecting a target](https://help.qlik.com/en-US/cloud-services/Subsystems/Hub/Content/Sense_Hub/DataFlow/Creating-data-flow.htm#Selecting_target) for more information. When placed on the canvas, all these components will display a status to let you know what configuration is missing in order to produce a valid data flow that you can run. These statuses include: * Not connected: The component is missing a connection to an upstream or downstream component. * Not configured: Some configuration fields have not been filled in, or the configuration has not been saved yet. * Invalid: An error has been detected in the component configuration. * Deactivated: This status means that the configuration of the previous component in the flow is not complete or valid. * Save required: Displayed when a Calculate fields processor is stale * Run required: Displayed when a Qlik script processor is stale. * OK: The component configuration is complete and valid. ### Properties The Properties panel allows you to access the configuration of the component currently selected on the canvas. You can rename your component and add a short description. When looking at a source, you can edit the fields loaded in the data flow. In the case of a processor, this is where you select which function to apply and where you set other configuration parameters specific to each processor. See [Data flow processors](https://help.qlik.com/en-US/cloud-services/Subsystems/Hub/Content/Sense_Hub/DataFlow/List-of-data-flow-processors.htm) for more information. Finally, when editing a target, you can select the space and path of the resulting file. ![Example of properties for a processor](https://help.qlik.com/en-US/cloud-services/Subsystems/Hub/Content/Resources/Images/Dataflow/data_flow_processor_porperties.png) ### Preview At any point during the design of your data flow, you can select a component and open the Preview panel to get a glimpse of the current state of your data, and the resulting script. To hide or show the script statement or the live data preview, use the Script and Data preview toggles in the panel header. ![Script and data preview after a hash operation](https://help.qlik.com/en-US/cloud-services/Subsystems/Hub/Content/Resources/Images/Dataflow/data_flow_preview_panel.png) In the Data preview section of the panel, use the cog the More icon icon to set the size of the sample, and then the Refresh button to apply the change. You can also use the Search fields field to look for and highlight a specific field. The behavior of the data preview is the following: * There is no limit to the number of rows you can display in the preview. * You can enter -1 as value to load the entire table. * The number that you set as preview size will also affect the number of rows loaded by Qlik script processors.