How to Change a Feed for WordPress Blogger

Blogger
1. Log in to your Blogger account, and click the 'Settings' link next to the blog you want to edit.
2. Click 'Site Feed.'

3. Type the RSS feed URL and file name in the first two fields. Select whether to show the 'Full' blog post in the feed, the 'Short' summary or the 'Until Jump Break' to take it to the break.
4. Add a footer which appears on your feed, if necessary. Click 'Save Settings' to update the changes to your feed.
WordPress
5. Log in to your WordPress blog, and go to the 'Settings' section.
6. Click 'Reading.'
7. Select the amount of items which display on the syndication feed.
8. Select whether to display 'Full Text' or 'Summary' for each post on the feed.
9. Click 'Save Changes.'