diff --git a/Makefile b/Makefile
index 5d020de7a..6148027f5 100644
--- a/Makefile
+++ b/Makefile
@@ -397,14 +397,20 @@ check-licenses: install-wwhrd
 	wwhrd check -f .wwhrd.yml
 
 copy-docs:
-	echo "---\nsort: ${ORDER}\n---\n" > ${DST}
+	> ${DST}
+	@if [[ ${ORDER} > 0 ]]; then \
+		echo "---\nsort: ${ORDER}\n---\n" > ${DST}; \
+	fi
 	cat ${SRC} >> ${DST}
+	sed -i '' 's/<img src=\"docs\//<img src=\"/' ${DST}
 
 # Copies docs for all components and adds the order tag.
+# For ORDER=0 it adds no order tag.
+# Images starting with <img src="docs/ are replaced with <img src="
 # Cluster docs are supposed to be ordered as 9th.
-# For The rest of docs is ordered manually.t
+# The rest of docs is ordered manually.
 docs-sync:
-	cp README.md docs/README.md
+	SRC=README.md DST=docs/README.md ORDER=0 $(MAKE) copy-docs
 	SRC=README.md DST=docs/Single-server-VictoriaMetrics.md ORDER=1 $(MAKE) copy-docs
 	SRC=app/vmagent/README.md DST=docs/vmagent.md ORDER=3 $(MAKE) copy-docs
 	SRC=app/vmalert/README.md DST=docs/vmalert.md ORDER=4 $(MAKE) copy-docs
diff --git a/README.md b/README.md
index fb466698a..ee69a6382 100644
--- a/README.md
+++ b/README.md
@@ -337,100 +337,86 @@ See also [vmagent](https://docs.victoriametrics.com/vmagent.html), which can be
 
 ## How to send data from DataDog agent
 
-VictoriaMetrics accepts data from [DataDog agent](https://docs.datadoghq.com/agent/) or [DogStatsD](https://docs.datadoghq.com/developers/dogstatsd/) via ["submit metrics" API](https://docs.datadoghq.com/api/latest/metrics/#submit-metrics) at `/datadog/api/v1/series` path.
+VictoriaMetrics accepts data from [DataDog agent](https://docs.datadoghq.com/agent/) 
+or [DogStatsD](https://docs.datadoghq.com/developers/dogstatsd/) 
+via ["submit metrics" API](https://docs.datadoghq.com/api/latest/metrics/#submit-metrics) 
+at `/datadog/api/v1/series` path.
 
-### Single-node VictoriaMetrics:
+### Sending metrics to VictoriaMetrics
 
-Run DataDog agent with environment variable `DD_DD_URL=http://victoriametrics-host:8428/datadog`. Alternatively, set `dd_url` param at [DataDog agent configuration file](https://docs.datadoghq.com/agent/guide/agent-configuration-files/) to `http://victoriametrics-host:8428/datadog`.
+DataDog agent allows configuring destinations for metrics sending via ENV variable `DD_DD_URL` 
+or via [configuration file](https://docs.datadoghq.com/agent/guide/agent-configuration-files/) in section `dd_url`.
 
-### Cluster version of VictoriaMetrics:
-
-Run DataDog agent with environment variable `DD_DD_URL=http://vinsert-host:8480/insert/0/datadog`. Alternatively, set `dd_url` param at [DataDog agent configuration file](https://docs.datadoghq.com/agent/guide/agent-configuration-files/) to `DD_DD_URL=http://vinsert-host:8480/insert/0/datadog`.
-
-VictoriaMetrics doesn't check `DD_API_KEY` param, so it can be set to arbitrary value.
-
-Example of how to send data to VictoriaMetrics via [DataDog "submit metrics"](https://docs.victoriametrics.com/url-examples.html#datadogapiv1series) from command line:
-
-### Single-node VictoriaMetrics:
-
-```console
-echo '
-{
-  "series": [
-    {
-      "host": "test.example.com",
-      "interval": 20,
-      "metric": "system.load.1",
-      "points": [[
-        0,
-        0.5
-      ]],
-      "tags": [
-        "environment:test"
-      ],
-      "type": "rate"
-    }
-  ]
-}
-' | curl -X POST --data-binary @- http://victoriametrics-host:8428/datadog/api/v1/series
-```
-
-### Cluster version of VictoriaMetrics:
+<p align="center">
+  <img src="docs/Single-server-VictoriaMetrics-sending_DD_metrics_to_VM.png" width="800">
+</p>
 
+To configure DataDog agent via ENV variable add the following prefix:
 <div class="with-copy" markdown="1">
 
-```console
-echo '
-{
-  "series": [
-    {
-      "host": "test.example.com",
-      "interval": 20,
-      "metric": "system.load.1",
-      "points": [[
-        0,
-        0.5
-      ]],
-      "tags": [
-        "environment:test"
-      ],
-      "type": "rate"
-    }
-  ]
-}
-' | curl -X POST --data-binary @- http://vminsert-host:8480/insert/0/datadog/api/v1/series
+```
+DD_DD_URL=http://victoriametrics:8428/datadog
 ```
 
 </div>
 
+_Choose correct URL for VictoriaMetrics [here](https://docs.victoriametrics.com/url-examples.html#datadog)._
 
-The imported data can be read via [export API](https://docs.victoriametrics.com/url-examples.html#apiv1export):
-
-### Single-node VictoriaMetrics:
+To configure DataDog agent via [configuration file](https://docs.datadoghq.com/agent/guide/agent-configuration-files)
+add the following line:
 
 <div class="with-copy" markdown="1">
 
-```console
-curl http://victoriametrics-host:8428/api/v1/export -d 'match[]=system.load.1'
+```
+dd_url: http://victoriametrics:8428/datadog
 ```
 
 </div>
 
-### Cluster version of VictoriaMetrics:
+vmagent also can accept Datadog metrics format. Depending on where vmagent will forward data, 
+pick [single-node or cluster URL]((https://docs.victoriametrics.com/url-examples.html#datadog)) formats.
+
+### Sending metrics to Datadog and VictoriaMetrics
+ 
+DataDog allows configuring [Dual Shipping](https://docs.datadoghq.com/agent/guide/dual-shipping/) for metrics 
+sending via ENV variable `DD_ADDITIONAL_ENDPOINTS` or via configuration file `additional_endpoints`.
+ 
+<p align="center">
+  <img src="docs/Single-server-VictoriaMetrics-sending_DD_metrics_to_VM_and_DD.png" width="800">
+</p>
+ 
+Run DataDog using the following ENV variable with VictoriaMetrics as additional metrics receiver:
 
 <div class="with-copy" markdown="1">
 
-```console
-curl http://vmselect-host:8481/select/0/prometheus/api/v1/export -d 'match[]=system.load.1'
+```
+DD_ADDITIONAL_ENDPOINTS='{\"http://victoriametrics:8428/datadog\"}'
 ```
 
 </div>
 
-This command should return the following output if everything is OK:
+_Choose correct URL for VictoriaMetrics [here](https://docs.victoriametrics.com/url-examples.html#datadog)._
+
+
+To configure DataDog Dual Shipping via [configuration file](https://docs.datadoghq.com/agent/guide/agent-configuration-files)
+add the following line:
+
+<div class="with-copy" markdown="1">
 
-```json
-{"metric":{"__name__":"system.load.1","environment":"test","host":"test.example.com"},"values":[0.5],"timestamps":[1632833641000]}
 ```
+additional_endpoints: http://victoriametrics:8428/datadog
+```
+
+</div>
+
+### Send via cURL
+
+See how to send data to VictoriaMetrics via 
+[DataDog "submit metrics"](https://docs.victoriametrics.com/url-examples.html#datadogapiv1series) from command line.
+
+The imported data can be read via [export API](https://docs.victoriametrics.com/url-examples.html#apiv1export).
+
+### Additional details
 
 VictoriaMetrics automatically sanitizes metric names for the data ingested via DataDog protocol
 according to [DataDog metric naming recommendations](https://docs.datadoghq.com/metrics/custom_metrics/#naming-custom-metrics).
@@ -451,7 +437,7 @@ See [these docs](https://docs.victoriametrics.com/vmagent.html#adding-labels-to-
 
 ## How to send data from InfluxDB-compatible agents such as [Telegraf](https://www.influxdata.com/time-series-platform/telegraf/)
 
-Use `http://<victoriametric-addr>:8428` url instead of InfluxDB url in agents' configs.
+Use `http://<victoriametrics-addr>:8428` url instead of InfluxDB url in agents' configs.
 For instance, put the following lines into `Telegraf` config, so it sends data to VictoriaMetrics instead of InfluxDB:
 
 ```toml
diff --git a/docs/README.md b/docs/README.md
index fb466698a..9a2539643 100644
--- a/docs/README.md
+++ b/docs/README.md
@@ -337,100 +337,86 @@ See also [vmagent](https://docs.victoriametrics.com/vmagent.html), which can be
 
 ## How to send data from DataDog agent
 
-VictoriaMetrics accepts data from [DataDog agent](https://docs.datadoghq.com/agent/) or [DogStatsD](https://docs.datadoghq.com/developers/dogstatsd/) via ["submit metrics" API](https://docs.datadoghq.com/api/latest/metrics/#submit-metrics) at `/datadog/api/v1/series` path.
+VictoriaMetrics accepts data from [DataDog agent](https://docs.datadoghq.com/agent/) 
+or [DogStatsD](https://docs.datadoghq.com/developers/dogstatsd/) 
+via ["submit metrics" API](https://docs.datadoghq.com/api/latest/metrics/#submit-metrics) 
+at `/datadog/api/v1/series` path.
 
-### Single-node VictoriaMetrics:
+### Sending metrics to VictoriaMetrics
 
-Run DataDog agent with environment variable `DD_DD_URL=http://victoriametrics-host:8428/datadog`. Alternatively, set `dd_url` param at [DataDog agent configuration file](https://docs.datadoghq.com/agent/guide/agent-configuration-files/) to `http://victoriametrics-host:8428/datadog`.
+DataDog agent allows configuring destinations for metrics sending via ENV variable `DD_DD_URL` 
+or via [configuration file](https://docs.datadoghq.com/agent/guide/agent-configuration-files/) in section `dd_url`.
 
-### Cluster version of VictoriaMetrics:
-
-Run DataDog agent with environment variable `DD_DD_URL=http://vinsert-host:8480/insert/0/datadog`. Alternatively, set `dd_url` param at [DataDog agent configuration file](https://docs.datadoghq.com/agent/guide/agent-configuration-files/) to `DD_DD_URL=http://vinsert-host:8480/insert/0/datadog`.
-
-VictoriaMetrics doesn't check `DD_API_KEY` param, so it can be set to arbitrary value.
-
-Example of how to send data to VictoriaMetrics via [DataDog "submit metrics"](https://docs.victoriametrics.com/url-examples.html#datadogapiv1series) from command line:
-
-### Single-node VictoriaMetrics:
-
-```console
-echo '
-{
-  "series": [
-    {
-      "host": "test.example.com",
-      "interval": 20,
-      "metric": "system.load.1",
-      "points": [[
-        0,
-        0.5
-      ]],
-      "tags": [
-        "environment:test"
-      ],
-      "type": "rate"
-    }
-  ]
-}
-' | curl -X POST --data-binary @- http://victoriametrics-host:8428/datadog/api/v1/series
-```
-
-### Cluster version of VictoriaMetrics:
+<p align="center">
+  <img src="Single-server-VictoriaMetrics-sending_DD_metrics_to_VM.png" width="800">
+</p>
 
+To configure DataDog agent via ENV variable add the following prefix:
 <div class="with-copy" markdown="1">
 
-```console
-echo '
-{
-  "series": [
-    {
-      "host": "test.example.com",
-      "interval": 20,
-      "metric": "system.load.1",
-      "points": [[
-        0,
-        0.5
-      ]],
-      "tags": [
-        "environment:test"
-      ],
-      "type": "rate"
-    }
-  ]
-}
-' | curl -X POST --data-binary @- http://vminsert-host:8480/insert/0/datadog/api/v1/series
+```
+DD_DD_URL=http://victoriametrics:8428/datadog
 ```
 
 </div>
 
+_Choose correct URL for VictoriaMetrics [here](https://docs.victoriametrics.com/url-examples.html#datadog)._
 
-The imported data can be read via [export API](https://docs.victoriametrics.com/url-examples.html#apiv1export):
-
-### Single-node VictoriaMetrics:
+To configure DataDog agent via [configuration file](https://docs.datadoghq.com/agent/guide/agent-configuration-files)
+add the following line:
 
 <div class="with-copy" markdown="1">
 
-```console
-curl http://victoriametrics-host:8428/api/v1/export -d 'match[]=system.load.1'
+```
+dd_url: http://victoriametrics:8428/datadog
 ```
 
 </div>
 
-### Cluster version of VictoriaMetrics:
+vmagent also can accept Datadog metrics format. Depending on where vmagent will forward data, 
+pick [single-node or cluster URL]((https://docs.victoriametrics.com/url-examples.html#datadog)) formats.
+
+### Sending metrics to Datadog and VictoriaMetrics
+ 
+DataDog allows configuring [Dual Shipping](https://docs.datadoghq.com/agent/guide/dual-shipping/) for metrics 
+sending via ENV variable `DD_ADDITIONAL_ENDPOINTS` or via configuration file `additional_endpoints`.
+ 
+<p align="center">
+  <img src="Single-server-VictoriaMetrics-sending_DD_metrics_to_VM_and_DD.png" width="800">
+</p>
+ 
+Run DataDog using the following ENV variable with VictoriaMetrics as additional metrics receiver:
 
 <div class="with-copy" markdown="1">
 
-```console
-curl http://vmselect-host:8481/select/0/prometheus/api/v1/export -d 'match[]=system.load.1'
+```
+DD_ADDITIONAL_ENDPOINTS='{\"http://victoriametrics:8428/datadog\"}'
 ```
 
 </div>
 
-This command should return the following output if everything is OK:
+_Choose correct URL for VictoriaMetrics [here](https://docs.victoriametrics.com/url-examples.html#datadog)._
+
+
+To configure DataDog Dual Shipping via [configuration file](https://docs.datadoghq.com/agent/guide/agent-configuration-files)
+add the following line:
+
+<div class="with-copy" markdown="1">
 
-```json
-{"metric":{"__name__":"system.load.1","environment":"test","host":"test.example.com"},"values":[0.5],"timestamps":[1632833641000]}
 ```
+additional_endpoints: http://victoriametrics:8428/datadog
+```
+
+</div>
+
+### Send via cURL
+
+See how to send data to VictoriaMetrics via 
+[DataDog "submit metrics"](https://docs.victoriametrics.com/url-examples.html#datadogapiv1series) from command line.
+
+The imported data can be read via [export API](https://docs.victoriametrics.com/url-examples.html#apiv1export).
+
+### Additional details
 
 VictoriaMetrics automatically sanitizes metric names for the data ingested via DataDog protocol
 according to [DataDog metric naming recommendations](https://docs.datadoghq.com/metrics/custom_metrics/#naming-custom-metrics).
@@ -451,7 +437,7 @@ See [these docs](https://docs.victoriametrics.com/vmagent.html#adding-labels-to-
 
 ## How to send data from InfluxDB-compatible agents such as [Telegraf](https://www.influxdata.com/time-series-platform/telegraf/)
 
-Use `http://<victoriametric-addr>:8428` url instead of InfluxDB url in agents' configs.
+Use `http://<victoriametrics-addr>:8428` url instead of InfluxDB url in agents' configs.
 For instance, put the following lines into `Telegraf` config, so it sends data to VictoriaMetrics instead of InfluxDB:
 
 ```toml
diff --git a/docs/Sending_DD_metrics_to_VM.png b/docs/Single-server-VictoriaMetrics-sending_DD_metrics_to_VM.png
similarity index 100%
rename from docs/Sending_DD_metrics_to_VM.png
rename to docs/Single-server-VictoriaMetrics-sending_DD_metrics_to_VM.png
diff --git a/docs/Sending_DD_metrics_to_VM_and_DDhq.png b/docs/Single-server-VictoriaMetrics-sending_DD_metrics_to_VM_and_DD.png
similarity index 100%
rename from docs/Sending_DD_metrics_to_VM_and_DDhq.png
rename to docs/Single-server-VictoriaMetrics-sending_DD_metrics_to_VM_and_DD.png
diff --git a/docs/Single-server-VictoriaMetrics.md b/docs/Single-server-VictoriaMetrics.md
index 100a9457a..da3e76d27 100644
--- a/docs/Single-server-VictoriaMetrics.md
+++ b/docs/Single-server-VictoriaMetrics.md
@@ -341,19 +341,21 @@ See also [vmagent](https://docs.victoriametrics.com/vmagent.html), which can be
 
 ## How to send data from DataDog agent
 
-VictoriaMetrics accepts data from [DataDog agent](https://docs.datadoghq.com/agent/) or [DogStatsD](https://docs.datadoghq.com/developers/dogstatsd/) via ["submit metrics" API](https://docs.datadoghq.com/api/latest/metrics/#submit-metrics) at `/datadog/api/v1/series` path.
+VictoriaMetrics accepts data from [DataDog agent](https://docs.datadoghq.com/agent/) 
+or [DogStatsD](https://docs.datadoghq.com/developers/dogstatsd/) 
+via ["submit metrics" API](https://docs.datadoghq.com/api/latest/metrics/#submit-metrics) 
+at `/datadog/api/v1/series` path.
 
 ### Sending metrics to VictoriaMetrics
 
-DataDog agent allows configuring destinations for metrics sending via ENV variable `DD_DD_URL` or via [configuration file](https://docs.datadoghq.com/agent/guide/agent-configuration-files/) in section `dd_url`.
+DataDog agent allows configuring destinations for metrics sending via ENV variable `DD_DD_URL` 
+or via [configuration file](https://docs.datadoghq.com/agent/guide/agent-configuration-files/) in section `dd_url`.
 
 <p align="center">
-  <img src="Sending_DD_metrics_to_VM.png" width="800">
+  <img src="Single-server-VictoriaMetrics-sending_DD_metrics_to_VM.png" width="800">
 </p>
 
-Depending on where you want to send metrics, the [URL for VictoriaMetrics](https://docs.victoriametrics.com/url-examples.html#datadog) will be different:
-1. Run DataDog using this ENV variable for sending metrics to VictoriaMetrics
-
+To configure DataDog agent via ENV variable add the following prefix:
 <div class="with-copy" markdown="1">
 
 ```
@@ -362,7 +364,10 @@ DD_DD_URL=http://victoriametrics:8428/datadog
 
 </div>
 
-Alternatively add this `dd_url` to DataDog YAML configuration file.
+_Choose correct URL for VictoriaMetrics [here](https://docs.victoriametrics.com/url-examples.html#datadog)._
+
+To configure DataDog agent via [configuration file](https://docs.datadoghq.com/agent/guide/agent-configuration-files)
+add the following line:
 
 <div class="with-copy" markdown="1">
 
@@ -372,17 +377,19 @@ dd_url: http://victoriametrics:8428/datadog
 
 </div>
 
-2. vmagent also can accept Datadog metrics format. Depending on where vmagent will forward data, pick the single-node or cluster URL formats.
+vmagent also can accept Datadog metrics format. Depending on where vmagent will forward data, 
+pick [single-node or cluster URL]((https://docs.victoriametrics.com/url-examples.html#datadog)) formats.
 
 ### Sending metrics to Datadog and VictoriaMetrics
  
-DataDog allows configuring [Dual Shipping](https://docs.datadoghq.com/agent/guide/dual-shipping/) for metrics sending via ENV variable `DD_ADDITIONAL_ENDPOINTS` or via configuration file `additional_endpoints` described in section YAML configuration.
+DataDog allows configuring [Dual Shipping](https://docs.datadoghq.com/agent/guide/dual-shipping/) for metrics 
+sending via ENV variable `DD_ADDITIONAL_ENDPOINTS` or via configuration file `additional_endpoints`.
  
 <p align="center">
-  <img src="Sending_DD_metrics_to_VM_and_DDhq.png" width="800">
+  <img src="Single-server-VictoriaMetrics-sending_DD_metrics_to_VM_and_DD.png" width="800">
 </p>
  
-Run DataDog using this ENV variable for sending metrics to the single-node VictoriaMetrics on top of DataDoghq.
+Run DataDog using the following ENV variable with VictoriaMetrics as additional metrics receiver:
 
 <div class="with-copy" markdown="1">
 
@@ -392,103 +399,26 @@ DD_ADDITIONAL_ENDPOINTS='{\"http://victoriametrics:8428/datadog\"}'
 
 </div>
 
-Alternatively add an `additional_endpoints` to [DataDog agent configuration file](https://docs.datadoghq.com/agent/guide/agent-configuration-files/).
+_Choose correct URL for VictoriaMetrics [here](https://docs.victoriametrics.com/url-examples.html#datadog)._
+
+
+To configure DataDog Dual Shipping via [configuration file](https://docs.datadoghq.com/agent/guide/agent-configuration-files)
+add the following line:
 
 <div class="with-copy" markdown="1">
 
 ```
-dd_url: http://victoriametrics:8428/datadog
+additional_endpoints: http://victoriametrics:8428/datadog
 ```
 
 </div>
 
 ### Send via cURL
 
-Example of how to send data to VictoriaMetrics via [DataDog "submit metrics"](https://docs.victoriametrics.com/url-examples.html#datadogapiv1series) from command line:
+See how to send data to VictoriaMetrics via 
+[DataDog "submit metrics"](https://docs.victoriametrics.com/url-examples.html#datadogapiv1series) from command line.
 
-### Single-node VictoriaMetrics:
-
-<div class="with-copy" markdown="1">
-
-```console
-echo '
-{
-  "series": [
-    {
-      "host": "test.example.com",
-      "interval": 20,
-      "metric": "system.load.1",
-      "points": [[
-        0,
-        0.5
-      ]],
-      "tags": [
-        "environment:test"
-      ],
-      "type": "rate"
-    }
-  ]
-}
-' | curl -X POST --data-binary @- http://victoriametrics:8428/datadog/api/v1/series
-```
-</div>
-
-### Cluster version of VictoriaMetrics:
-
-<div class="with-copy" markdown="1">
-
-```console
-echo '
-{
-  "series": [
-    {
-      "host": "test.example.com",
-      "interval": 20,
-      "metric": "system.load.1",
-      "points": [[
-        0,
-        0.5
-      ]],
-      "tags": [
-        "environment:test"
-      ],
-      "type": "rate"
-    }
-  ]
-}
-' | curl -X POST --data-binary @- http://vminsert:8480/insert/0/datadog/api/v1/series
-```
-
-</div>
-
-
-The imported data can be read via [export API](https://docs.victoriametrics.com/url-examples.html#apiv1export):
-
-### Single-node VictoriaMetrics:
-
-<div class="with-copy" markdown="1">
-
-```console
-curl http://victoriametrics:8428/api/v1/export -d 'match[]=system.load.1'
-```
-
-</div>
-
-### Cluster version of VictoriaMetrics:
-
-<div class="with-copy" markdown="1">
-
-```console
-curl http://vmselect:8481/select/0/prometheus/api/v1/export -d 'match[]=system.load.1'
-```
-
-</div>
-
-This command should return the following output if everything is OK:
-
-```json
-{"metric":{"__name__":"system.load.1","environment":"test","host":"test.example.com"},"values":[0.5],"timestamps":[1632833641000]}
-```
+The imported data can be read via [export API](https://docs.victoriametrics.com/url-examples.html#apiv1export).
 
 ### Additional details