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diff --git a/doc/RSS-feeds.md b/doc/RSS-feeds.md
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 #RSS feeds
+### Feeds options
+
+Feeds are available in ATOM with `?do=atom` and RSS with `do=RSS`.
+
+Options:
+- You can use `permalinks` in the feed URL to get permalink to Shaares instead of direct link to shaared URL.
+    - E.G. `https://my.shaarli.domain/?do=atom&permalinks`.
+- You can use `nb` parameter in the feed URL to specify the number of Shaares you want in a feed (default if not specified: `50`). The keyword `all` is available if you want everything.
+    - `https://my.shaarli.domain/?do=atom&permalinks&nb=42`
+    - `https://my.shaarli.domain/?do=atom&permalinks&nb=all`
+
 ### RSS Feeds or Picture Wall for a specific search/tag
+
 It is possible to filter RSS/ATOM feeds and Picture Wall on a Shaarli to **only display results of a specific search, or for a specific tag**.
 
 For example, if you want to subscribe only to links tagged `photography`: