docs: Added version notice for time range variables

3ad48ff7 · Torkel Ödegaard · b32c3a9d · 3ad48ff7
Commit 3ad48ff7 authored Jan 30, 2019 by Torkel Ödegaard
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docs/sources/reference/templating.md
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@@ -248,7 +248,7 @@ Grafana has global built-in variables that can be used in expressions in the que
 ### Time range variables

 Grafana has two built in time range variables in `$__from` and `$__to`. They are currently always interpolated
-as epoch milliseconds.
+as epoch milliseconds. These variables are only available in Grafana v6.0 and above.

 ### The $__interval Variable