# Install/Update

The following preferences can be changed on the Install/Update page:

Option | Description | Default
--- | --- | ---
Maximum number of 'History' configurations | Maximum number of configurations you want maintained in the configuration history. These configurations are maintained to allow you to revert to a previous configuration of installed feature versions. | 100
Check digital signatures of downloaded archives | This option will check for digital signatures of downloaded archives. | On
Automatically select mirros | This option will automatically select a mirror when updating. | Off

Valid updates

Assuming that feature versions use the form 'major.minor.service', you can select what update level you want to choose from:

equivalent
  Only service updates will be displayed.
compatible
  Service updates and minor updates will be displayed.

equivalent

Update Policy | The update policy URL that controls the redirection of update sites within an organization. | No policy

Here is what the Install/Update preference page looks like:

Updating Eclipse with the update manager

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