add some screenshots to the README

README.rst

@@ -11,6 +11,43 @@ This adds the following features to your pretalx instance:
 * a pdf export containing information about a talk, so video helpers
   can have easy access to the needed information
 
+Screenshots
+-----------
+
+All screenshots show the talk "Compatible static software" by "Stephanie
+Fisher", which was generated by the `create_test_event` command. The
+event color is `#EA652D`, a bright orange. The track color is `#857EB0`,
+a light purple.
+
+.. image:: img/lower_thirds.png
+   :width: 400
+   :alt: Screenshot of "lower thirds" view. The box is located in the
+         bottom quarter of the screen, taking about half the screen width.
+         The box is mostly colored in the event color, with a small strip
+         showing the track color at the bottom. Inside the box the talk
+         title is shown in large text on top, the speaker name below that.
+         On the bottom right of the box the configured info line is shown.
+
+.. image:: img/room_info.png
+   :width: 400
+   :alt: Screenshot of the "room info" view. The whole screen is coloured
+         in the track color. On top of the screen you see the room name
+         in small font, below that the talk title in large letters. Below
+         that there's the speaker name listed. On the remainder of the
+         screen you see a large QR code linking to the talk detail page
+         in the schedule. The URL is also shown in plain-text below the
+         QR code.
+
+.. image:: img/pdf_export.png
+   :width: 400
+   :alt: Screenshot of the first half of a pdf page. On the top you see
+         a large text "DO NOT RECORD - DO NOT STREAM", because the speaker
+         selected "Do not record" in the CfP. Below that you find
+         information like event- and room-name, date and time, talk title,
+         checkboxes for each speaker, length of the talk, talk abstract.
+         Also you can find answers to select questions and notes entered
+         inside pretalx on the pdf export.
+
 Development setup
 -----------------