diff -ur logrotate-3.20.0.orig/logrotate.8.in logrotate-3.20.0/logrotate.8.in
--- logrotate-3.20.0.orig/logrotate.8.in	2022-03-31 14:00:36.000000000 +0200
+++ logrotate-3.20.0/logrotate.8.in	2022-05-25 15:40:21.015424608 +0200
@@ -48,6 +48,17 @@
 is given on the command line, every file in that directory is used as
 a config file.
 .P
+If \fBlogrotate\fR is called via \fBsystemd\fR(1), following  order of
+parsed config files is defined in the \fIlogrotate.service\fR file:
+.TS
+tab(:);
+l l l.
+\fI/usr/etc/logrotate.conf\fR:Default configuration file defined by the vendor.
+\fI/usr/etc/logrotate.d/*\fR:Directory for additional configuration files defined by the vendor.
+\fI/etc/logrotate.conf\fR:Default configuration file defined by the administrator. (optional)
+\fI/etc/logrotate.d/*\fR:Directory for additional configuration files defined by the administrator. (optional)
+.TE
+.P
 If no command line arguments are given, \fBlogrotate\fR will print
 version and copyright information, along with a short usage summary.  If
 any errors occur while rotating logs, \fBlogrotate\fR will exit with
@@ -752,7 +763,8 @@
 tab(:);
 l l l.
 \fI@STATE_FILE_PATH@\fR:Default state file.
-\fI/etc/logrotate.conf\fR:Configuration options.
+\fI/usr/etc/logrotate.conf\fR:Configuration options defined by the vendor.
+\fI/etc/logrotate.conf\fR:Configuration options defined by the administrator.
 .TE