Copy editing

markafoltz · markafoltz · commit e2e22eff7243 · 2015-07-06T13:12:24.000-07:00
diff --git a/uc-req.md b/uc-req.md
@@ -14,33 +14,33 @@ This section collects relevant use cases for the [Presentation API][pres-api].
 
 ### <a name="uc01"></a>UC01: Presentation
 
-A user is preparing a set of slides for a talk. Using a web-based service, she
-is editing her slides and speaker notes on the primary screen while the
-secondary larger screen shows a preview of the current slide. When the slides
-are done, her mobile phone allows her to access them from an online service
-while on the go. Coming to the conference, using wireless display technology,
-she would like to present her slides on the stage screen from her mobile phone.
-The phone's touch screen helps her to navigate slides and presents a slide
-preview while the projector shows her slides to the audience.
+A user is preparing a set of slides for a talk. Using a Web-based service, she
+edits her slides and speaker notes on the primary screen while the secondary
+larger screen shows a preview of the current slide.  When the slides are done,
+her mobile phone allows her to access them from an online service while on the
+go.  At the conference, using wireless display technology, she presents her
+slides on the stage screen from her mobile phone.  The phone's touch screen
+helps her to navigate slides and presents a slide preview while the stage screen
+shows her slides to the audience.
 
 **Requirements**: [REQ01](#req01), [REQ02](#req02), [REQ05](#req05), [REQ06](#req06)
 
 ### <a name="uc02"></a>UC02: Video and image sharing
 
 Using an online video or image sharing service, a user would like to show
-memorable moments to her friends. Using a device with a small screen, however, a
-user cannot show the content to a large group of people. Connecting an external
-TV screen or projector to her device - with a cable or wirelessly - the online
+memorable moments to her friends.  However, she cannot show the content to a
+large group of people using her smartphone with its small screen.  She connects
+an external TV screen to her mobile device (wired or wirelessly); the online
 sharing service now makes use of the connected display, allowing a wider
-audience to enjoy the content. The web page shows UI elements that allow the
-user to trigger displaying content on the secondary display (e.g., a "send to
-second screen") only if there is at least one presentation display available.
-The user selects a set of videos and images to show on the second display. The playback
-starts on the secondary display and will continue even if the user navigates to another
-web page on his mobile device. The user can navigate back to the online sharing service
-and the controlling page will connect automatically to the running session on the
-presentation display.
+audience to enjoy the content.  After the connection is made, the Web page adds
+a button (e.g., "send to second screen") that allows her to send content to
+the TV screen.
 
+She clicks the "send to second screen" button to start display on her
+TV screen, then selects a set of videos and images to show there. The playback
+starts on the TV screen and continues even after she navigates to another Web
+page on her mobile device.  She navigates back to the online sharing service and
+the site reconnects automatically to the content shown on the TV screen.
 
 **Requirements**: [REQ01](#req01), [REQ02](#req02), [REQ03](#req03), [REQ05](#req05), [REQ06](#req06)
 
@@ -51,14 +51,15 @@ selects the option "create new game" to start a game session for two
 players. The poker site detects that there is display available and asks Bob to
 extend the game UI by keeping his personal cards and control UI on the
 smartphone and displaying the poker table on the large display. Bob confirms and
-waits for other players to join. Alice is visiting Bob and decides to join the
-game.  She opens the same poker site in the browser on her smartphone and
-selects the option "join game". The browser shows a dialog with a list of
-running poker sessions. She selects the session started by Bob and joins the
-game. The game starts immediately after two players are joined. Now Alice and
-Bob can see their personal cards on their smartphones and the large screen
-displays the poker table with shared cards, current bets, and remaining money of
-each player.
+waits for other players to join.
+
+Alice is visiting Bob and decides to join the game.  She opens the same poker
+site in the browser on her smartphone and selects the option "join game". The
+browser shows a dialog with a list of running poker sessions. She selects the
+session started by Bob and joins the game. The game starts immediately after two
+players are joined. Now Alice and Bob can see their personal cards on their
+smartphones and the large screen displays the poker table with shared cards,
+current bets, and remaining money of each player.
 
 **Requirements**: [REQ01](#req01), [REQ02](#req02), [REQ04](#req04), [REQ05](#req05), [REQ06](#req06), [REQ07](#req07)
 
@@ -103,26 +104,31 @@ on "Alice's kitchen TV".
 
 ### <a name="uc05"></a>UC05: Multiplayer gaming - Pictionary
 
-Bob visits a Pictionary game [PICTIONARYGAME] site on his smartphone. He clicks the
-"Start on TV" button and selects his TV’s name from the list
-of presentation devices that pops up on the phone's screen. The Pictionary site
-opens on the TV screen. Bob now waits for Ann and Joe to join the game from their
-smartphones by opening the same site and connecting to the TV. After all
-the players have joined Bob presses the "start game" button on his smartphone and
-receives the first word to draw. He has to draw a blanket. Bob draws a picture of
-a blanket on the touch screen of his smartphone. The picture is mirrored on the
-TV screen while he is drawing. At the same time Ann and Joe are trying to guess
-what Bob is drawing by typing answers on their own smartphones and sending them
-to the TV screen. TV shows all the answers coming from all the users and the game
-continues until the correct answer is provided by Ann. Ann gets points for the
-correct answer. Next round of the game is about to start with Ann drawing a new word.
-At this point Joe decides to exit the game and presses the "exit game" button.
-That information is passed to the TV and Joe's name disappears from the list of
-the players on the TV screen. Bob and Ann play one more round of the game with Ann
-drawing and Bob guessing the correct word. After that round is over they decide
-to stop playing and both press the "exit game" button on their smartphones.
-The site opened on TV is notified that all the players have left the game and
-starts presenting a list of top players on the TV screen.
+Bob visits a Pictionary game [PICTIONARYGAME] site on his smartphone. He clicks
+the "Start on TV" button and selects his TV’s name from the list of presentation
+displays that pops up on the phone's screen. The Pictionary site opens on the TV
+screen.
+
+Bob now waits for Ann and Joe to join the game from their smartphones by opening
+the same site and connecting to the TV. After all the players have joined, Bob
+presses the "start game" button on his smartphone and receives the first word to
+draw: "blanket."
+
+Bob draws a picture of a blanket on the touch screen of his smartphone. The
+picture is mirrored on the TV screen as he draws. At the same time, Ann
+and Joe are trying to guess what Bob is drawing by typing answers on their own
+smartphones and sending them to the TV screen. The TV shows the answers coming
+from all users and the game continues until Ann provides the correct answer.
+Ann gets points for the correct answer.  The next round of the game starts with
+Ann drawing a new word.
+
+Joe then decides to exit the game by pressing the "exit game" button.  That
+information is passed to the TV and Joe's name disappears from the list of the
+players on the TV screen. Bob and Ann play one more round of the game with Ann
+drawing and Bob guessing the correct word. After that round is over, they decide
+to stop playing and both press the "exit game" button on their smartphones.  The
+site on the TV is notified that all the players have left the game, and it
+presents a list of the top players.
 
 **Requirements**: [REQ01](#req01), [REQ02](#req02), [REQ04](#req04), [REQ05](#req05), [REQ06](#req06), [REQ07](#req07)
 
@@ -218,4 +224,4 @@ needed.
 
 ## References
 
-[PICTIONARYGAME] https://en.wikipedia.org/wiki/Pictionary
+[PICTIONARYGAME] https://en.wikipedia.org/wiki/Pictionary
