--- a/docs/man3/SDL_UpdateRects.3	Sun Jun 10 18:39:47 2001 +0000
+++ b/docs/man3/SDL_UpdateRects.3	Sun Jun 10 19:31:57 2001 +0000
@@ -1,4 +1,4 @@
-.TH "SDL_UpdateRects" "3" "Mon 12 Mar 2001, 01:04" "SDL" "SDL API Reference" 
+.TH "SDL_UpdateRects" "3" "Sun 10 Jun 2001, 19:42" "SDL" "SDL API Reference" 
 .SH "NAME"
 SDL_UpdateRects\- Makes sure the given list of rectangles is updated on the given screen\&.
 .SH "SYNOPSIS"
@@ -8,10 +8,18 @@
 \fBvoid \fBSDL_UpdateRects\fP\fR(\fBSDL_Surface *screen, int numrects, SDL_Rect *rects\fR);
 .SH "DESCRIPTION"
 .PP
-Makes sure the given list of rectangles is updated on the given screen\&.
+Makes sure the given list of rectangles is updated on the given screen\&. The rectangles must all be confined within the screen boundaries (no clipping is done)\&.
+.PP
+This function should not be called while \fBscreen\fR is \fIlocked\fR\&.
 .PP
-This function should not be called while \fBscreen\fR is \fIlocked\fR\&. 
+.RS
+\fBNote:  
+.PP
+It is adviced to call this function only once per frame, since each call has some processing overhead\&. This is no restriction since you can pass any number of rectangles each time\&.
+.PP
+The rectangles are not automatically merged or checked for overlap\&. In general, the programmer can use his knowledge about his particular rectangles to merge them in an efficient way, to avoid overdraw\&.
+.RE
 .SH "SEE ALSO"
 .PP
 \fI\fBSDL_UpdateRect\fP\fR, \fI\fBSDL_Rect\fR\fR, \fI\fBSDL_Surface\fR\fR, \fI\fBSDL_LockSurface\fP\fR
-...\" created by instant / docbook-to-man, Mon 12 Mar 2001, 01:04
+...\" created by instant / docbook-to-man, Sun 10 Jun 2001, 19:42