Index: globalconst.h
===================================================================
--- globalconst.h	(revision 5044)
+++ globalconst.h	(revision 5045)
@@ -38,49 +38,49 @@
 /* frame between the groundplane and the copper or mask - noone seems
    to remember what these two are for; changing them may have unforeseen
    side effects. */
-#define GROUNDPLANEFRAME        PCB_MIL_TO_COORD(15)
-#define MASKFRAME               PCB_MIL_TO_COORD(3)
+#define PCB_GROUNDPLANEFRAME        PCB_MIL_TO_COORD(15)
+#define PCB_MASKFRAME               PCB_MIL_TO_COORD(3)
 
 /* ---------------------------------------------------------------------------
  * some limit specifications
  */
-#define LARGE_VALUE      (COORD_MAX / 2 - 1) /* maximum extent of board and elements */
+#define PCB_LARGE_VALUE      (COORD_MAX / 2 - 1) /* maximum extent of board and elements */
 
-#define MAX_LAYER        16    /* max number of layer, check source code for more changes, a *lot* more changes */
-#define MIN_LINESIZE     PCB_MIL_TO_COORD(0.01)	/* thickness of lines */
-#define MAX_LINESIZE     LARGE_VALUE
-#define MIN_ARCSIZE      PCB_MIL_TO_COORD(0.01)
-#define MAX_ARCSIZE      LARGE_VALUE
-#define MIN_TEXTSCALE    10 /* scaling of text objects in percent */
-#define MAX_TEXTSCALE    10000
-#define MIN_PINORVIASIZE PCB_MIL_TO_COORD(20)	/* size of a pin or via */
-#define MIN_PINORVIAHOLE PCB_MIL_TO_COORD(4)	/* size of a pins or vias drilling hole */
-#define MAX_PINORVIASIZE LARGE_VALUE
-#define MIN_PINORVIACOPPER PCB_MIL_TO_COORD(4)	/* min difference outer-inner diameter */
-#define MIN_PADSIZE      PCB_MIL_TO_COORD(1)	/* min size of a pad */
-#define MAX_PADSIZE      LARGE_VALUE   /* max size of a pad */
-#define MIN_DRC_VALUE    PCB_MIL_TO_COORD(0.1)
-#define MAX_DRC_VALUE    PCB_MIL_TO_COORD(500)
-#define MIN_DRC_SILK     PCB_MIL_TO_COORD(1)
-#define MAX_DRC_SILK     PCB_MIL_TO_COORD(30)
-#define MIN_DRC_DRILL    PCB_MIL_TO_COORD(1)
-#define MAX_DRC_DRILL    PCB_MIL_TO_COORD(50)
-#define MIN_DRC_RING     0
-#define MAX_DRC_RING     PCB_MIL_TO_COORD(100)
-#define MIN_GRID         1
-#define MAX_GRID         PCB_MIL_TO_COORD(1000)
-#define MAX_FONTPOSITION 255 /* upper limit of characters in my font */
+#define PCB_MAX_LAYER        16    /* max number of layer, check source code for more changes, a *lot* more changes */
+#define PCB_MIN_LINESIZE     PCB_MIL_TO_COORD(0.01)	/* thickness of lines */
+#define PCB_MAX_LINESIZE     PCB_LARGE_VALUE
+#define PCB_MIN_ARCSIZE      PCB_MIL_TO_COORD(0.01)
+#define PCB_MAX_ARCSIZE      PCB_LARGE_VALUE
+#define PCB_MIN_TEXTSCALE    10 /* scaling of text objects in percent */
+#define PCB_MAX_TEXTSCALE    10000
+#define PCB_MIN_PINORVIASIZE PCB_MIL_TO_COORD(20)	/* size of a pin or via */
+#define PCB_MIN_PINORVIAHOLE PCB_MIL_TO_COORD(4)	/* size of a pins or vias drilling hole */
+#define PCB_MAX_PINORVIASIZE PCB_LARGE_VALUE
+#define PCB_MIN_PINORVIACOPPER PCB_MIL_TO_COORD(4)	/* min difference outer-inner diameter */
+#define PCB_MIN_PADSIZE      PCB_MIL_TO_COORD(1)	/* min size of a pad */
+#define PCB_MAX_PADSIZE      PCB_LARGE_VALUE   /* max size of a pad */
+#define PCB_MIN_DRC_VALUE    PCB_MIL_TO_COORD(0.1)
+#define PCB_MAX_DRC_VALUE    PCB_MIL_TO_COORD(500)
+#define PCB_MIN_DRC_SILK     PCB_MIL_TO_COORD(1)
+#define PCB_MAX_DRC_SILK     PCB_MIL_TO_COORD(30)
+#define PCB_MIN_DRC_DRILL    PCB_MIL_TO_COORD(1)
+#define PCB_MAX_DRC_DRILL    PCB_MIL_TO_COORD(50)
+#define PCB_MIN_DRC_RING     0
+#define PCB_MAX_DRC_RING     PCB_MIL_TO_COORD(100)
+#define PCB_MIN_GRID         1
+#define PCB_MAX_GRID         PCB_MIL_TO_COORD(1000)
+#define PCB_MAX_FONTPOSITION 255 /* upper limit of characters in my font */
 
-#define MAX_COORD        LARGE_VALUE /* coordinate limits */
-#define MIN_SIZE         PCB_MIL_TO_COORD(10) /* lowest width and height of the board */
-#define MAX_BUFFER       5 /* number of pastebuffers additional changes in menu.c are also required to select more buffers */
+#define PCB_MAX_COORD        PCB_LARGE_VALUE /* coordinate limits */
+#define PCB_MIN_SIZE         PCB_MIL_TO_COORD(10) /* lowest width and height of the board */
+#define PCB_MAX_BUFFER       5 /* number of pastebuffers additional changes in menu.c are also required to select more buffers */
 
-#define DEFAULT_DRILLINGHOLE 40 /* default inner/outer ratio for pins/vias in percent */
+#define PCB_DEFAULT_DRILLINGHOLE 40 /* default inner/outer ratio for pins/vias in percent */
 
-#if MAX_LINESIZE > MAX_PINORVIASIZE	/* maximum size value */
-#define MAX_SIZE MAX_LINESIZE
+#if PCB_MAX_LINESIZE > PCB_MAX_PINORVIASIZE	/* maximum size value */
+#define PCB_MAX_SIZE PCB_MAX_LINESIZE
 #else
-#define MAX_SIZE MAX_PINORVIASIZE
+#define PCB_MAX_SIZE PCB_MAX_PINORVIASIZE
 #endif
 
 #ifndef MAXPATHLEN   /* maximum path length */