Day One offers four different views for your data. You can view your Timeline, Photos, Media, and Calendar. Each one offers a different perspective on looking back on your memories.
The view options are along the bottom of the app. Each one is a tap away.
This is a chronological list of the entries. Entries on the same date will be under one date heading on the right side. Tap the date to view the Today view.
There are now options in the Media view to start a new entry from the Photo Picker or camera at the top. Near the bottom, there are filters for Photos, Video, Audio, and PDF entries.
Tap on the pins to view the entries. Tap the blue button to view visible region in Timeline, then switch to the Timeline view to see a filtered list of entries in that area.
Using the Calendar view, you can view past entries or scroll to a date to create entries on past or future days. See here.
While scrolling through the Timeline, Photos, or Calendar view, you can tap on that icon a second time to quickly scroll to the current date.