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Yes. See Service Preferences for details on how to add membership programs for air travel, hotel, car rental, and car service, and airport parking.
Which travel documents can I keep in my profile?
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To open the Profile page, either click the Profile tab at the top of the screen or click the Profile row on the right of the screen and then click Go to your Profile link. Click the Display Settings link. Select your preferences and click Save. See Display Settings for details.