1. Go to Blogger Dashboard.
2. Click on your Blog Title.
3. Navigate to Settings tab.
4. Now jump to Other tab.
Allow Blog Feed
This option will syndicate entire content of your post including comments.
Until Jump Break
If you are using jump breaks in your posts, this option will shows post content before jump break.
Select this option if you wanna syndicate approximately 400 characters of your post.
This option will disable your site feed.
This option will allow you to customize your Post feed, Comment feed and Per-Post Comment feed individually.
Post Feed Redirect URL
Post Feed Footer
6. After changing required settings, click Save settings button.
* If you wanna change number of recent posts shown on your redirected feed, read How to Change Number of Posts Shown on Your Blogger Feed.