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-rw-r--r--docs/env_vars.md2
1 files changed, 2 insertions, 0 deletions
diff --git a/docs/env_vars.md b/docs/env_vars.md
index 3f1926d3..b28849cc 100644
--- a/docs/env_vars.md
+++ b/docs/env_vars.md
@@ -12,6 +12,8 @@ wlroots specific
wayland, x11, headless)
* *WLR_WL_OUTPUTS*: when using the wayland backend specifies the number of outputs
* *WLR_X11_OUTPUTS*: when using the X11 backend specifies the number of outputs
+* *WLR_HEADLESS_OUTPUTS*: when using the headless backend specifies the number
+ of outputs
rootston specific
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