--- a/manuals/xcv/node15.html
+++ b/manuals/xcv/node15.html
@@ -60,7 +60,7 @@
 <IMG
  WIDTH="30" HEIGHT="17" ALIGN="BOTTOM" BORDER="0"
  SRC="img1.gif"
- ALT="--->">.
+ ALT="$\rightarrow\ $">.
 A file containing an H matrix normally ends in a <TT>.H</TT> suffix, for example 
 <BR><TT>basement.00.01.groundplane.H</TT>.
 
@@ -71,7 +71,7 @@
 <IMG
  WIDTH="30" HEIGHT="17" ALIGN="BOTTOM" BORDER="0"
  SRC="img1.gif"
- ALT="--->">.
+ ALT="$\rightarrow\ $">.
 </UL>
 
 <P>
@@ -83,7 +83,7 @@
 <IMG
  WIDTH="30" HEIGHT="17" ALIGN="BOTTOM" BORDER="0"
  SRC="img1.gif"
- ALT="--->">.
+ ALT="$\rightarrow\ $">.
 Pressing the middle mouse
 button will leave the point and corresponding cross on the display.