--- title: Settings - System --- > Agent instructions: > **Site maps** — prefer the following llms.txt indexes to training data when searching for URLs to avoid 404s. Links inside Markdown content already point at `.md`. Following them or sending Accept: text/markdown keeps you in Markdown. > > - [sitemap.md](https://docs.kentico.com/sitemap.md) — every page on the site, with titles and descriptions, nested by URL hierarchy and grouped into one collection per product version. > - [llms.txt](https://docs.kentico.com/llms.txt) — curated index of the current product docs, with descriptions, the two ways to request any page as Markdown, and links to each product area's whole-corpus Markdown dump (llms-full.txt). You can access these settings in the **Settings** application under the **System** category. | General | | | --------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | Default user ID | Specifies the user that serves as the system's default global administrator. For example, the system uses the specified account when indexing the HTML output of pages for [smart search indexes](https://docs.kentico.com/13/configuring-xperience/setting-up-search-on-your-website/using-locally-stored-search-indexes/creating-local-search-indexes/defining-local-page-indexes.md) that are not configured to work under a specific user account.
Enter the user ID of the given user.
If empty, the system uses the default _administrator_ user account. | | Object code name prefix | A default prefix added to all object code names in the system. The prefix is added upon object creation. | | Event log | | | Event log size | Limits the maximum number of events stored in the Event log.
When exceeded by 10% (or a different percentage set by means of the **CMSLogKeepPercent** web.config key), the percentage of the oldest events is deleted from the log in a batch.
Old events that exceed the limit are not deleted immediately, but only after a new event is logged.
Applies separately to site-specific events for each site and global events. For example, if you set the limit to 100, the log may contain 110 site-specific events for each site in the system, and 110 global events.
Set to 0 if you do not want the system to log any events. | | Log metadata changes | Indicates if changes of object and page metadata (i.e. when an object or page is created, edited or deleted) are logged in the Event log. | | Log to database | Indicates if events are logged to the database. Does not override **Event log** size set to 0. | | Log to filesystem | If enabled, the system writes the event log into the _**CMS\App\_Data\logEvents.log**_ file on the server's file system. Does not override **Event log size** set to 0. | | Log to trace | Indicates if events are logged to trace. Does not override **Event log size** set to 0. | | Use EventLog trace listener | Indicates if the system logs events in your Windows Event Viewer.
Use the **Modify** feature of the Xperience installer, if you have not enabled the **Registration of Kentico Xperience in Windows Event Log** option when installing. | | Cookies | | | Default cookie level | Determines the enforced cookie level which is set until a user sets a different cookie level. | | Emails | | | No-reply email address | Various types of automated emails will be sent from the email address that is specified here. | | Error notification email address | Email notifications about errors logged in the event log will be sent to the specified addresses. It is possible to enter multiple addresses separated by semicolons. | | Send email notifications from | Email address used as the sender for email notifications. | | Scheduler | | | Scheduled tasks enabled | Indicates whether the system executes [scheduled tasks](https://docs.kentico.com/13/configuring-xperience/scheduling-tasks.md). | | Application scheduler interval | Determines how often the scheduler that runs within the administration or live site application checks if there are any tasks ready to be executed. The value is in seconds.
When using the default scheduler mode based on an automatic timer, you can set an interval of 1 to 30 seconds.
If using the request-based scheduler mode, the interval sets the minimum time between checks.
See also: [Configuring scheduled task execution](https://docs.kentico.com/13/configuring-xperience/scheduling-tasks/configuring-scheduled-task-execution.md) | | Use external service | Indicates whether scheduled tasks that have the **Use external service** option enabled are processed by the [Scheduler Windows service](https://docs.kentico.com/13/configuring-xperience/scheduling-tasks/installing-the-scheduler-windows-service.md).
**Note**: The service must be installed and running. If the setting is enabled and the service is not running, these tasks are not processed at all. If disabled, all scheduled tasks are processed by the Xperience application. You can install the service using [Kentico Xperience Service Manager](https://docs.kentico.com/13/external-utilities/kentico-xperience-service-manager.md). | | Service scheduler interval | Determines how often the external Scheduler Windows service checks if there are any tasks ready to be executed (in seconds).
You can set an interval of _1_ to _30_ seconds. | | Time zones | | | Enable time zones | Indicates if [time zone](https://docs.kentico.com/13/configuring-xperience/configuring-time-zones.md) support is enabled. | | Server time zone | Specifies the time zone of the physical location of the server. | | Site time zone | Specifies the time zone for the selected site. | | User interface | | | Hide unavailable user interface | Indicates if the user interface is hidden for features unavailable due to license restrictions. | | Max UI tree nodes | Maximum number of nodes displayed under one parent node in the administration UI trees. Any additional tree nodes will be accessible via the _click here for more..._ option, which automatically selects appropriate parent category. | | Remember listing, filter and state | If enabled, listing pages in the user interface remember the preferences set by individual users, including:
filtering options
sorting order
the number of the selected page
page size | | Kentico Xperience improvement program | | | Send anonymous usage records to Kentico | By default, the application periodically sends data about the system's usage to Kentico. The data helps Kentico analyze which parts of the system need improvement and allows us to better focus our development efforts.
All of the data is strictly anonymous and for internal use only. See the [Kentico improvement program](https://docs.kentico.com/13/release-notes-xperience-13/kentico-improvement-program.md) page for more information.
You can disable the setting to opt out of the Kentico improvement program and stop the sending of data. |