X-Git-Url: http://winboard.nl/cgi-bin?a=blobdiff_plain;f=xboard.texi;h=464c756a07f77839816b9281405f2a1adc890326;hb=59b7ace7dd899298869a0921c0b9137e233c196b;hp=8703fc39b2f6262aaa9d8b360dbc00e3baba1d38;hpb=2987ec348b8b2cbf38ba9a6a0793652a6b238ae8;p=xboard.git

diff --git a/xboard.texi b/xboard.texi
index 8703fc3..464c756 100644
--- a/xboard.texi
+++ b/xboard.texi
@@ -3259,6 +3259,16 @@ and if they should be used rather than using simple colors.
 The algorithm for cutting squares out of a given bitmap is such that
 the picture is perfectly reproduced when a bitmap the size of
 the complete board is given.
+If the filename ends in "-NxM.png", with integer N and M,
+it is assumed to contain a bitmap of a complete board of N files
+and M ranks, and XBoard will scale it to exactly match the
+current square size.
+If N=M=0 it scales the entire bitmap to the size of the board,
+irrespective of the number of files and ranks of the latter.
+Without any -NxM suffix textures are only blown up by an integer
+factor when they are smaller than the square size, or,
+when the name starts with "xq", too small to cover the
+complete Xiangqi board.
 Default: false and ""
 @item -drag/-xdrag or -animateDragging true/false
 @cindex drag, option