diff --git a/src/gfx_func.h b/src/gfx_func.h
--- a/src/gfx_func.h
+++ b/src/gfx_func.h
@@ -93,18 +93,26 @@ void DrawSprite(SpriteID img, PaletteID 
 
 /** How to align the to-be drawn text. */
 enum StringAlignment {
-	SA_LEFT,      ///< Left align the text
-	SA_CENTER,    ///< Center the text
-	SA_RIGHT,     ///< Right align the text
-	SA_MASK  = 3, ///< Mask for base alignment
-	SA_FORCE = 4, ///< Force the alignment, i.e. don't swap for RTL languages.
-	SA_STRIP = 8, ///< Strip the SETX/SETXY commands from the string
+	SA_LEFT        = 0 << 0, ///< Left align the text.
+	SA_HOR_CENTER  = 1 << 0, ///< Horizontally center the text.
+	SA_RIGHT       = 2 << 0, ///< Right align the text (must be a single bit).
+	SA_HOR_MASK    = 3 << 0, ///< Mask for horizontal alignment.
+
+	SA_TOP         = 0 << 2, ///< Top align the text.
+	SA_VERT_CENTER = 1 << 2, ///< Vertically center the text.
+	SA_BOTTOM      = 2 << 2, ///< Bottom align the text.
+	SA_VERT_MASK   = 3 << 2, ///< Mask for vertical alignment.
+
+	SA_CENTER      = SA_HOR_CENTER | SA_VERT_CENTER, ///< Center both horizontally and vertically.
+
+	SA_FORCE       = 1 << 4, ///< Force the alignment, i.e. don't swap for RTL languages.
+	SA_STRIP       = 1 << 5, ///< Strip the SETX/SETXY commands from the string
 };
 DECLARE_ENUM_AS_BIT_SET(StringAlignment)
 
 int DrawString(int left, int right, int top, const char *str, TextColour colour = TC_FROMSTRING, StringAlignment align = SA_LEFT, bool underline = false);
 int DrawString(int left, int right, int top, StringID str, TextColour colour = TC_FROMSTRING, StringAlignment align = SA_LEFT, bool underline = false);
-int DrawStringMultiLine(int left, int right, int top, int bottom, StringID str, TextColour colour = TC_FROMSTRING, StringAlignment align = SA_LEFT, bool underline = false);
+int DrawStringMultiLine(int left, int right, int top, int bottom, StringID str, TextColour colour = TC_FROMSTRING, StringAlignment align = (SA_TOP | SA_LEFT), bool underline = false);
 
 void DrawCharCentered(uint32 c, int x, int y, TextColour colour);