What's on a Plan's page, and how do I change a Plan?

Tap a day on the Schedule tab, then tap one of its Plans, or tap a Plan on Home, to open it. Its page shows the date, when it starts and ends (with the next day's date if it runs past midnight) or Anytime for a Plan with no set time, how long it is, its Type, how often it repeats, the place, and the note; tap the place to open it in Maps. To change the Plan, tap Edit (the pencil). For a recurring plan, saving asks whether the change is for only this date, this and future dates, or all dates. More (•••) holds Duplicate, Log as Time, Open in Maps, Copy Address, Copy Note, and Delete. Duplicate opens a new Plan with the same details; a one-time Plan's copy starts on the same day next week, and you can change the date before you save. With Buddies, the page also lists who you invited and how each answered, plus anyone who asked to join, with Invite. Tap Invite Buddies to invite someone right away while the Plan is still ahead; they get the date, time, title, location, and note. To take someone off, use Edit. For a Plan you joined through a buddy's invitation, the page shows who organized it and your answer. Switch between Going and Can't Make It anytime until the Plan ends: Can't Make It takes the Plan off your schedule, and Going puts it back. After the Plan, you can still open it, with its note and photos, for a month, but no longer change your answer.