You can make a copy of SyntaxHighlighter.XML in Work directory and change styles (set font to Vera monospace and size to 14, for example) in that copy as follows:
<Style fontsize="14" fontname="VeraMo" name="Default"/>
<Style fontsize="14" fontname="VeraMo" name="Bold" fontstyle="{0}"/>
<Style fontsize="14" fontname="VeraMo" name="Italic" fontstyle="{1}"/>
<Style fontsize="14" fontname="VeraMo" name="Red" color="FF0000FF"/>
<Style fontsize="14" fontname="VeraMo" name="Blue" color="FFFF"/>
<Style fontsize="14" fontname="VeraMo" name="Green" fontstyle="{0}" color="9000FF"/>
<Style fontsize="14" fontname="VeraMo" name="Comment" color="808080FF"/>
<Style fontsize="14" fontname="VeraMo" name="ToDo" color = "FF0000FF" fontstyle="{0}"/>
<Style fontsize="14" fontname="VeraMo" name="CommentItalic" fontstyle="{1}" color="808080FF"/>
<Style fontsize="14" fontname="VeraMo" name="Control" fontstyle="{0}" color="FFFF"/>
<Style fontsize="14" fontname="VeraMo" name="Modifiers" color="A000FF"/>
<Style fontsize="14" fontname="VeraMo" name="Locking" color="FF00FFFF"/>
<Style fontsize="14" fontname="VeraMo" name="Checks" fontstyle="{0}" color="FFFF"/>
<Style fontsize="14" fontname="VeraMo" name="Threads" color="FF00FFFF"/>
<Style fontsize="14" fontname="VeraMo" name="Structure" fontstyle="{0}" color="FF"/>
<Style fontsize="14" fontname="VeraMo" name="Operators" fontstyle="{0}" color="FFFF"/>
<Style fontsize="14" fontname="VeraMo" name="Values" color="30A0A0FF"/>
<Style fontsize="14" fontname="VeraMo" name="BasicTypes" color="FFFF"/>
<Style fontsize="14" fontname="VeraMo" name="ComplexTypes" fontstyle="{0}" color="FFFF"/>
<Style fontsize="14" fontname="VeraMo" name="Dangerous" fontstyle="{0}" color="FF0000FF"/>
<Style fontsize="14" fontname="VeraMo" name="Debug" color="FFFF"/>
<Style fontsize="14" fontname="VeraMo" name="String" color="BF003FFF"/>
<Style fontsize="14" fontname="VeraMo" name="Error" bgcolor="FF0000FF"/>
