Update man page

nnn.1

@@ -290,7 +290,7 @@ files.
     codes: 0-black, 1-red, 2-green, 3-yellow, 4-blue (default), 5-magenta, 6-cyan, 7-white
 .Ed
 .Pp
-\fBNNN_IDLE_TIMEOUT:\fR set idle timeout (in seconds) to invoke terminal locker.
+\fBNNN_IDLE_TIMEOUT:\fR set idle timeout (in seconds) to invoke terminal locker (default: disabled).
 .Pp
 \fBNNN_COPIER:\fR set to a clipboard copier script.
 .Bd -literal
@@ -304,7 +304,7 @@ files.
     export NNN_SCRIPT=/usr/local/bin/nscript
 .Ed
 .Pp
-\fBNNN_MULTISCRIPT:\fR run multiple custom scripts.
+\fBNNN_MULTISCRIPT:\fR run multiple custom scripts (default: disabled).
 .Bd -literal
     export NNN_MULTISCRIPT=1
 .Ed
@@ -314,13 +314,12 @@ files.
     export NNN_SHOW_HIDDEN=1
 .Ed
 .Pp
-\fBNNN_NO_AUTOSELECT:\fR Disable directory auto-selection in \fInavigate-as-you-type\fR mode.
+\fBNNN_NO_AUTOSELECT:\fR disable directory auto-selection in \fInavigate-as-you-type\fR mode.
 .Bd -literal
     export NNN_NO_AUTOSELECT=1
 .Ed
 .Pp
-\fBDISABLE_FILE_OPEN_ON_NAV:\fR Disable file open on \fBRight\fR or \fBl\fR keys. To open
-files, press \fBEnter\fR.
+\fBDISABLE_FILE_OPEN_ON_NAV:\fR disable file open on \fBRight\fR or \fBl\fR keys (\fBEnter\fR opens files).
 .Bd -literal
     export DISABLE_FILE_OPEN_ON_NAV=1
 .Ed