- The optional parameter <EM>n</EM> is a number from 1 to 10, inclusive,
- indicating the desired level of detail of information. If ncurses
- is built without tracing support, the optional parameter is
- ignored. If <EM>n</EM> is omitted, the default level is 1. If <EM>n</EM> is speci-
- fied and greater than 1, the level of detail is increased.
+ The optional parameter <EM>n</EM> is a number from 1 to 9, inclusive,
+ indicating the desired level of detail of information.
+
+ <STRONG>o</STRONG> If ncurses is built without tracing support, the optional
+ parameter is ignored.
+
+ <STRONG>o</STRONG> If <EM>n</EM> is omitted, the default level is 1.
+
+ <STRONG>o</STRONG> If <EM>n</EM> is specified and greater than 1, the level of detail is
+ increased, and the output is written (with tracing
+ information) to the "trace" file.