diff --git a/crtools.c b/crtools.c
index d0628a429..f09f664ea 100644
--- a/crtools.c
+++ b/crtools.c
@@ -368,9 +368,9 @@ usage:
 "Dump/Restore options:\n"
 "\n"
 "* Generic:\n"
-"  -t|--tree PID         checkpoint/restore the whole process tree identified by PID\n"
+"  -t|--tree PID         checkpoint/restore a process tree identified by PID\n"
 "  -d|--restore-detached detach after restore\n"
-"  -s|--leave-stopped    leave tasks in stopped state after checkpoint instead of killing them\n"
+"  -s|--leave-stopped    leave tasks in stopped state after checkpoint\n"
 "  -R|--leave-running    leave tasks in running state after checkpoint\n"
 "  -D|--images-dir DIR   directory where to put images to\n"
 "     --pidfile FILE     write a pid of a root task to this file\n"
@@ -379,20 +379,17 @@ usage:
 "  -x|--" USK_EXT_PARAM "      allow external unix connections\n"
 "     --" SK_EST_PARAM "  checkpoint/restore established TCP connections\n"
 "  -r|--root PATH        change the root filesystem (when run in mount namespace)\n"
-"  --evasive-devices     use any path to a device file if the original one is inaccessible\n"
-"  --veth-pair IN=OUT    correspondence between outside and inside names of veth devices\n"
-"  --link-remap          allow to link unlinked files back when possible (modifies FS till restore)\n"
+"  --evasive-devices     use any path to a device file if the original one\n"
+"                        is inaccessible\n"
+"  --veth-pair IN=OUT    map inside veth device name to outside one\n"
+"  --link-remap          allow to link unlinked files back when possible\n"
 "  --action-script FILE  add an external action script\n"
-"                        The environment variable CRTOOLS_SCRIPT_ACTION contains one of the actions:\n"
-"                        * network-lock - lock network in a target network namespace\n"
-"                        * network-unlock - unlock network in a target network namespace\n"
 "  -j|--" OPT_SHELL_JOB "        allow to dump and restore shell jobs\n"
 "  -l|--" OPT_FILE_LOCKS "       handle file locks, for safety, only used for container\n"
 "\n"
 "* Logging:\n"
 "  -o|--log-file FILE    log file name (path is relative to --images-dir)\n"
-"     --log-pid          if the -o option is in effect, log of each restored process is\n"
-"                        written to a separate FILE.pid file\n"
+"     --log-pid          enable per-process logging to separate FILE.pid files\n"
 "  -v NUM                set logging level\n"
 "                          0 - messages regardless of log level\n"
 "                          1 - errors, when we are in trouble\n"