diff --git a/src/news.h b/src/news.h
--- a/src/news.h
+++ b/src/news.h
@@ -6,16 +6,16 @@
 #define NEWS_H
 
 struct NewsItem {
-	StringID string_id;
-	uint16 duration;
-	Date date;
-	byte flags;
-	byte display_mode;
-	byte type;
-	byte callback;
+	StringID string_id; ///< Message text (sometimes also used for storing other info)
+	uint16 duration;    ///< Remaining time for showing this news message
+	Date date;          ///< Date of the news
+	byte flags;         ///< NewsFlags bits @see NewsFlags
+	byte display_mode;  ///< Display mode value @see NewsMode
+	byte type;          ///< News category @see NewsType
+	byte callback;      ///< Call-back function
 
-	TileIndex data_a;
-	TileIndex data_b;
+	TileIndex data_a;   ///< Reference to tile or vehicle
+	TileIndex data_b;   ///< Reference to second tile or vehicle
 
 	uint64 params[10];
 };
@@ -24,7 +24,20 @@ typedef bool ValidationProc ( uint data_
 typedef void DrawNewsCallbackProc(Window *w);
 typedef StringID GetNewsStringCallbackProc(const NewsItem *ni);
 
+/**
+ * Macro for creating news flags.
+ * @param mode (bits 0 - 7) Display_mode, one of the NewsMode enums (NM_)
+ * @param flag (bits 8 - 15) OR-able news flags, any of the NewsFlags enums (NF_)
+ * @param type (bits 16-23) News category, one of the NewsType enums (NT_)
+ * @param cb (bits 24-31) Call-back function, one of the NewsCallback enums (DNC_) or 0 if no callback
+ * @see NewsMode
+ * @see NewsFlags
+ * @see NewsType
+ * @see NewsCallback
+ * @see AddNewsItem
+ */
 #define NEWS_FLAGS(mode, flag, type, cb) ((cb) << 24 | (type) << 16 | (flag) << 8 | (mode))
+
 void AddNewsItem(StringID string, uint32 flags, uint data_a, uint data_b);
 void NewsLoop();
 void DrawNewsBorder(const Window *w);
@@ -32,23 +45,28 @@ void InitNewsItemStructs();
 
 VARDEF NewsItem _statusbar_news_item;
 
+/** Type of news. */
 enum NewsType {
-	NT_ARRIVAL_PLAYER,
-	NT_ARRIVAL_OTHER,
-	NT_ACCIDENT,
-	NT_COMPANY_INFO,
-	NT_OPENCLOSE,
-	NT_ECONOMY,
-	NT_ADVICE,
-	NT_NEW_VEHICLES,
-	NT_ACCEPTANCE,
-	NT_SUBSIDIES,
-	NT_GENERAL,
-	NT_END,
+	NT_ARRIVAL_PLAYER,  ///< Cargo arrived for player
+	NT_ARRIVAL_OTHER,   ///< Cargo arrived for competitor
+	NT_ACCIDENT,        ///< An accident or disaster has occurred
+	NT_COMPANY_INFO,    ///< Company info (new companies, bankrupcy messages)
+	NT_OPENCLOSE,       ///< Opening and closing of industries
+	NT_ECONOMY,         ///< Economic changes (recession, industry up/dowm)
+	NT_ADVICE,          ///< Bits of news about vehicles of the player
+	NT_NEW_VEHICLES,    ///< New vehicle has become available
+	NT_ACCEPTANCE,      ///< A type of cargo is (no longer) accepted
+	NT_SUBSIDIES,       ///< News about subsidies (announcements, expirations, acceptance)
+	NT_GENERAL,         ///< General news (from towns)
+	NT_END,             ///< end-of-array marker
 };
 
 extern const char *_news_display_name[NT_END];
 
+/**
+ * News mode.
+ * @see NEWS_FLAGS
+ */
 enum NewsMode {
 	NM_SMALL    = 0, ///< Show only a small popup informing us about vehicle age for example
 	NM_NORMAL   = 1, ///< Show a simple news message (height 170 pixels)
@@ -56,6 +74,11 @@ enum NewsMode {
 	NM_CALLBACK = 3, ///< Do some special processing before displaying news message. Which callback to call is in NewsCallback
 };
 
+/**
+ * Various OR-able news-item flags.
+ * note: NF_INCOLOR is set automatically if needed
+ * @see NEWS_FLAGS
+ */
 enum NewsFlags {
 	NF_VIEWPORT  = (1 << 1), ///< Does the news message have a viewport? (ingame picture of happening)
 	NF_TILE      = (1 << 2), ///< When clicked on the news message scroll to a given tile? Tile is in data_a/data_b
@@ -64,11 +87,13 @@ enum NewsFlags {
 	NF_INCOLOR   = (1 << 5), ///< Show the newsmessage in colour, otherwise it defaults to black & white
 };
 
+/** Special news items */
 enum NewsCallback {
 	DNC_VEHICLEAVAIL  = 0, ///< Show new vehicle available message. StringID is EngineID
 	DNC_BANKRUPCY     = 1, ///< Show bankrupcy message. StringID is PlayerID (0-3) and NewsBankrupcy (4-7)
 };
 
+/** Kinds of bankrupcy */
 enum NewsBankrupcy {
 	NB_BTROUBLE    = (1 << 4), ///< Company is in trouble (warning)
 	NB_BMERGER     = (2 << 4), ///< Company has been bought by another company