# Scan History
At **Home >> Scan History,** you can access all the historical information related to executed scans.
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You can either select *All,* a *Project Group*, or a specific Single Project at the [Projects Selector](/introduction-to-xygeni/xygeni-web-ui-overview.md#projects-selector)
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The Top panel shows a timeline of the frequency of the scans, splitted by:
* Successful scans (SUCCESS) 
* Scans with errors in analysis (WARNING) 
* Scans with processing errors (ERROR) 
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* A scan is tagged as SUCCESS if ALL the executed scanners (deps, misconf, etc) were successful.
* A scan is tagged as WARNING if ANY of the executed scanners have failed.
* A scan is tagged as ERROR if ALL the executed scanners have failed.
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Clicking on the  details icon of a scan will open a slide with more information of the scan:
In case of error or warning, the slide will display the reason(s):
The list of scans also show (and filter) the **scope** of the scan: **complete** (**Full Scan**) or **partial** (**Partial Scan**)
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* A scan is tagged as **Full Scan** if ALL the scanners have been executed
* A scan is tagged as **Partial Scan** if SOME scanner has not been executed (*skipped*)
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Clicking on the  save icon of a scan marks that scan as the **baseline** of the project.
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See [Project Baseline](/introduction-to-xygeni/key-concepts/project-baseline.md) for further reference.
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### Scans Comparison
Most of Risk pages contain a functionality to compare scans. It can be accessed by selecting **ChangeLog** option.
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See [Comparison between different scans](/xygeni-products/application-security-posture-management-aspm/all-risks/issues-comparison-between-different-scans.md) for further information on how to compare scans
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```
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