posts/minrss.md: updated to reflect latest changes

posts/minrss.md

@@ -97,9 +97,10 @@ Install the wrapper script:
 For complete help, run `mrss -h`.
 
 To get started, all you need is `mrss update` to update feeds, then `mrss fzf` to view articles.
+Articles are, by default, saved to `~/rss`, but you can set `$MRSS_DIR` to change this.
 
 #### fzf shortcuts
-In `mrss`'s `fzf` interface, the following commands are available:
+In `mrss fzf`'s interface, the following commands are available:
 
 | Command | Shortcut | Description |
 | ------- | -------- | ----------- |
@@ -114,13 +115,34 @@ You can also use `Tab` and `Shift-Tab` to select multiple articles to be acted u
 #### viewing specific folders
 
 The `mrss fzf` command can be used to view a specific folder's contents.
-For example, use
+
+To read all null-program articles (regardless of if they are marked read or not):
 
     mrss fzf null-program
 
-to read all null-program articles (regardless of if they are marked read or not).
+To view new null-program articles:
-Or, run
+
+    mrss fzf new/null-program
+
+To see articles you've marked as "watch later":
 
     mrss fzf watch-later
 
-to see articles you've marked as "watch later".
+#### creating meta-feeds
+
+In the latest version of mrss, you can create tags to categorize your feeds.
+First, create a directory for your tag under `$MRSS_DIR`:
+
+    mkdir ~/rss/tag
+
+To include new articles for a given feed:
+
+    ln -sr ~/rss/new/feed ~/rss/tag/
+
+To include all articles:
+
+    ln -sr ~/rss/feed ~/rss/tag/
+
+To view this tag:
+
+    mrss fzf tag