diff --git a/docs/configuration.md b/docs/configuration.md
index 3b53084c22..8b5e2160c5 100644
--- a/docs/configuration.md
+++ b/docs/configuration.md
@@ -6,6 +6,18 @@ It is possible to change some of the n8n defaults via special environment variab
 The ones that currently exist are:
 
 
+## Execution Data Manual Runs
+
+n8n creates a random encryption key automatically on the first launch and saves
+it in the `~/.n8n` folder. That key gets used to encrypt the credentials before
+they get saved to the database. It is also possible to overwrite that key and
+set it via an environment variable.
+
+```bash
+export N8N_ENCRYPTION_KEY="<SOME RANDOM STRING>"
+```
+
+
 ## Execution Data Manual Runs
 
 Normally executions which got started via the Editor UI will not be saved as
@@ -51,6 +63,17 @@ export NODES_EXCLUDE="[\"n8n-nodes-base.executeCommand\",\"n8n-nodes-base.writeB
 ```
 
 
+## Custom Nodes Location
+
+Every user can add custom nodes that get loaded by n8n on startup. The default
+location is in the subfolder `.n8n/custom` of the user which started n8n.
+Additional folders can be defined via an environment variable.
+
+```bash
+export N8N_CUSTOM_EXTENSIONS="/home/jim/n8n/custom-nodes;/data/n8n/nodes"
+```
+
+
 ## Timezone
 
 The timezone is set by default to "America/New_York". It gets for example used by the
@@ -64,3 +87,15 @@ export GENERIC_TIMEZONE="Europe/Berlin"
 
 You can find the name of your timezone here:
 [https://momentjs.com/timezone/](https://momentjs.com/timezone/)
+
+
+## User Folder
+
+User-specific data like the encryption key, SQLite database file, and
+the ID of the tunnel (if used) get by default saved in the subfolder
+`.n8n` of the user which started n8n. It is possible to overwrite the
+user-folder via an environment variable.
+
+```bash
+export N8N_USER_FOLDER="/home/jim/n8n"
+```