2.7.3 Intent

2.7.3 Restore all to default: The user can restore all preference settings
to default values. (Level A)

Intent:

Users who customize settings may find that their chosen settings are not
suitable and decide to restore these settings to their default values.  For
some
users, it may be difficult to easily recall all modified settings while
others
may find it difficult to navigate to each modified setting, especially if a
particular setting may have impacted their ability to do so. This success
criteria provides a means for a user to easily restore all preference
settings
to their default values using a single function or action.