> ## Documentation Index
> Fetch the complete documentation index at: https://docs.cosmosid.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Analysis Snapshots

> A snapshot records the state of an Analysis Project at a point in time, including the module, its parameters and the output produced.

## What is an Analysis Snapshot?

On Cosmos-Hub 2.0, an **Analysis Snapshot** is a saved state of an analysis within an Analysis Project. It records the Analysis Module, the parameter values used, and the output produced, together with the name and description provided when the snapshot is saved.

Snapshots allow a specific analysis configuration to be preserved and reopened later. They also provide a record of how an analysis has changed over time and make it possible for other Workspace members to review or continue from a saved state.

## Navigating AP's Snapshot History

Clicking an **Analysis Project** opens the **Analysis Project Dashboard**. The **Analysis Snapshots** section lists all snapshots saved for that project. Each **Analysis Snapshot** acts as an entry point to the **Analysis Studio**, opening the Analysis Module used for that analysis together with the saved parameter configuration.

<img src="https://mintcdn.com/cmbio/9IPlECfVJPWdo6z4/images/analyses_snapshot_dashboard-1.jpg?fit=max&auto=format&n=9IPlECfVJPWdo6z4&q=85&s=da6e7f15b56b212be7e24098b1b52cbc" alt="Analyses Snapshot Dashboard 1" width="3554" height="1132" data-path="images/analyses_snapshot_dashboard-1.jpg" />

* Click **Open Current Analysis** (**Default**) to open the latest state of the Analysis Studio.
* Click **Open Snapshot** to open a saved Analysis Snapshot in the Analysis Studio, with the corresponding Analysis Module and parameter configuration restored.

#### Searching and filtering Analysis Snapshots within an AP

Use the search bar in the Analysis snapshots of the  Study Dashboard to find Analysis Projects and change how they are displayed.

<Frame>
  <img src="https://mintcdn.com/cmbio/IvW3mcdgB0VWEfpX/images/filter_and_search_bar-1.jpg?fit=max&auto=format&n=IvW3mcdgB0VWEfpX&q=85&s=bea00f0930710171852abe36d1ec5e39" alt="Filter And Search Bar 1" width="1132" height="102" data-path="images/filter_and_search_bar-1.jpg" />
</Frame>

1. **Select all** selects every Analysis Snapshot in the list. Available in card view only.
2. **Show Filters** displays filters below the column names. Enter text or numbers to search within a specific metadata column.
3. **Card View** displays Analysis Snapshots as cards.
4. **List View** displays Analysis Snapshots as rows in a table.
5. **Manage Columns** sets which metadata columns appear in list view.
6. **Full Screen** expands the list to fill the window.

#### Rename and delete Snapshots

Switch the view to list mode (4) and select a snapshot to rename or delete it.

<Warning>
  Deleting a snapshot is permanent. The parameter configuration and the output it recorded are removed. The Analysis Project, its cohort and its other snapshots are unaffected.
</Warning>

## Navigating snapshot from the Analysis Studio

#### Inside an Analysis Snapshot

Entering an Analysis Snapshot will open a saved Analysis Snapshot in the Analysis Studio, with the corresponding Analysis Module and parameter configuration restored.

<img src="https://mintcdn.com/cmbio/IvW3mcdgB0VWEfpX/images/inside_snapshot.jpg?fit=max&auto=format&n=IvW3mcdgB0VWEfpX&q=85&s=5cb6d6d05b21f2d65e10f9f71fd02112" alt="Inside Snapshot" width="3564" height="1044" data-path="images/inside_snapshot.jpg" />

To generate the Analysis Module output that was supposed to be saved with the Snapshot, simply click on 'Run and Apply' to regenerate the output.

<Tip>
  Snapshots are designed to be shared and further explored with other members of the Workspace. You can change any number of parameters after opening a snapshot. To return to the parameter values stored in that snapshot, click **Reset Snapshot**.

  Cosmos-Hub does not allow a new snapshot to be saved if its parameter configuration is identical to that of an existing snapshot in the same Analysis Project.
</Tip>

#### Taking Snapshots from the Analysis Studio

Inside the Analysis Studio, click **Save** in the control bar at the top right of the Analysis Studio and give the snapshot a name and description.

<Frame>
  <img src="https://mintcdn.com/cmbio/rXnT_KRi2R3YfV3p/images/save_snapshot-1.jpg?fit=max&auto=format&n=rXnT_KRi2R3YfV3p&q=85&s=1df23ba329f247ffd7e24a4f671738d1" alt="Save Snapshot 1" width="970" height="852" data-path="images/save_snapshot-1.jpg" />
</Frame>

#### Show AP Snapshot History

Clicking on '**History**' inside the Analysis Studio will display the list of all Snapshots available for the current Analysis Projects. This list is equivalent to that shown in Analysis Snapshots section of the Analysis Project Dashboard.

<img src="https://mintcdn.com/cmbio/IvW3mcdgB0VWEfpX/images/history_from_analysisStudio.jpg?fit=max&auto=format&n=IvW3mcdgB0VWEfpX&q=85&s=150ccd176217bd1077b772927f965090" alt="History From Analysis Studio" width="992" height="1030" data-path="images/history_from_analysisStudio.jpg" />

* Clicking on **Restore** for a snapshot will change the current Analysis Studio view to that Snapshot analysis module and parameters

<Note>
  **Reset Snapshot** and **Restore** do different things. **Reset Snapshot** undoes unsaved parameter changes in the snapshot you are working on. **Restore**, in the Snapshot History panel, switches to a different saved snapshot.
</Note>

## Next steps

<CardGroup cols={2}>
  <Card title="Pre-processing" icon="pencil-square" href="/analyses/the-analysis-studio">
    Run modules, change parameters and read the output.
  </Card>

  <Card title="Analysis modules" icon="grid" href="/analyses/analysis-modules/overview">
    What each module does and how to set its parameters.
  </Card>
</CardGroup>