diff --git a/web/templates/doc/embedding.html.md b/web/templates/doc/embedding.html.md
index ebdd58c..33eedb9 100644
--- a/web/templates/doc/embedding.html.md
+++ b/web/templates/doc/embedding.html.md
@@ -147,6 +147,16 @@ author). The available themes are:
* solarized-light
* monokai
+### cols
+
+The `cols` option allows overriding width (in characters) of the emulated
+terminal. By default the recorded terminal's width is used.
+
+### rows
+
+The `rows` option allows overriding height (in lines) of the emulated terminal.
+By default the recorded terminal's height is used.
+
## oEmbed / Open Graph / Twitter Card
asciinema supports [oEmbed](http://oembed.com/), [Open Graph](http://ogp.me/)