diff --git a/_docs/070_templates.md b/_docs/070_templates.md
index 2cc1471..bb3d1f7 100644
--- a/_docs/070_templates.md
+++ b/_docs/070_templates.md
@@ -47,6 +47,7 @@ When template processors run, they will be provided the following set of data.
| `yadm.os` | `YADM_OS` | Operating system | uname ‑s
* |
| `yadm.user` | `YADM_USER` | Current user | id ‑u ‑n
|
| `yadm.source` | `YADM_SOURCE` | Template filename | (fully qualified path) |
+| `env.VAR` | | Env variables | Any VAR in the environment while yadm templates are processed |
*
The OS for "Windows Subsystem for Linux" is reported as "WSL", even though uname identifies as "Linux".