User Guide > About the User Guide > Codebeamer: Common Concepts > Document Manager > Versioning and Access History
Versioning and Access History
All document access and changes are tracked, and each change is assigned a unique version number for auditing purposes.
If you wish to restore an older version of a document complete the following steps:
1. Click and select Properties.
2. Select Edit Properties, and then select the History tab, near the bottom of the screen. This shows all the versions to date.
3. Select Restore this version from the tool tip menu beside the version number that you wish to restore.
Codebeamer leaves all more recent versions unchanged. It increments the most recent version (makes a new version) and restores the old version to this new version number. For example, if your most recent document version is 13 and you wish to restore version 11, Codebeamer creates a new version, version 14, and places version 11 into version 14.
You can track changes when a document is edited, reviewed or deleted.
Permissions
You can set the Read (for open and download) and Edit (for write and upload) permissions on a document.
To set document permission:
1. Click the and select Properties.
2. Click the Permissions tab.
3. Edit the permissions.
4. Click Save.
Document Access Notification
Subscribe to e-mail notifications of document accesses or edits using the Notifications tab.
To set document access notifications:
1. Select Properties from the menu
2. Click the Notifications tab.
3. Add or remove users to read or edit notification group. (The 'Notify on Read' is available only for files).
4. Click Save.
* 
• Please note that you will not get notifications on your own changes.
• Project members receive automatic email notification when documents are created, read or edited.
Document Access History, Trends and Statistics
For document access visualization, customizable Wiki plugins are provided. You can use combination of these plugins in different wiki pages to visualize document access history.
The Wiki plugin example
[{LineChart title='Document Accesses in the past 30 days'



[{DataSet data='documentAccessTrend' documentId='11102' type='readWrite' since='30' format='lineChart'}]}]
This results into the chart:
Currently, there is insufficient data to render document access in the past 30 days chart. As your project evolves, that will automatically appear here.
Directory Access Notification
You can subscribe to directories with directory access notifications and be notified when there are accesses or changes to documents within the directory. You subscribe to receive e-mail notifications when a document in a directory has been opened (by reading or downloading) or edited (written or uploaded).
* 
Notifications on directories are not recursive to subdirectories.
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