Step #1 - Update Your Template Code First you need to edit your existing code. Go to Layout >> Edit HTML. There you first click on "Expand Widget Templates" showing right above the HTML editor box. Now do a search (CTRL + F) within the HTML editor box for the following code <data:post.body/>. Now add the following code just above the <data:post.body/> tag.
<b:if cond='data:blog.pageType == "item"'> <style>.fullpost{display:inline;}</style> <p><data:post.body/></p> <b:else/> <style>.fullpost{display:none;}</style>
The result should look something like this:
Now let’s add one more bit of code which will actually create the “read more” link in your post. This code will go below the <data:post.body/>tag so copy the following and paste it in. Feel free to change the “Read more…” text to whatever you want the link to look like. Be careful not to delete any other code during this process.
<b:if cond='data:blog.pageType != "item"'><br /> <a expr:href='data:post.url'>Read more...</a> </b:if> </b:if>
Yes, there are supposed to be two </b:if> tags in the above code so don’t think it’ s a mistake. The result should look like this:
This code will be the same no matter what template you are using. Just make sure it goes below the <data:post.body/> as shown in the image above. Now let’s look at what the final result should be. Here’s the updated code block you just worked on all put together: 
Ok, now save it. If it get saved means you have done it well. So move to the next step: Step #2 - Add a Class Tag in Your Default Post Template For this step go to Settings >> Formattingand scroll all the way down to the bottom. It’s the last option called “Post Template”. You’re going to paste in the following code:
<span> </span>
You’ll want to keep the spaces in there which will make sense later. After you save this, it will look like this:
Step #3 - Create a New Post Ok, we’ve got everything all setup so it’s time to go and test it out. Hopefully you’ve got a new post in mind for your blog. If not, then we’ll just create a test post which you can later delete. When you click on the “Posting” tab, you’ll notice that the post text area is now pre-populated with the <span class=”fullpost”> and </span> tags. If not, then you didn’t save it properly so go back and re-read step #2.
So when writing your new post, anything you put above the <span class=”fullpost”> tag will be the teaser text. The main body of your post needs to go in between the <span class=”fullpost”> and </span> tags in order for the “read more…” link to work properly. See the screenshot below. Sometimes pictures illustrate better than words.
Now publish or preview your post to see the “read more” hack working on your blog. If it doesn’t show up for some reason, go back and run through the steps again. Most likely you pasted the code blocks in the wrong places. It’s difficult to troubleshoot these issues since each template can be unique so please make sure to double-check your template before asking for help in the comments section below.
Here’s the live post with the “read more…” link properly working based on the text I used above in the post text area.
Additional Info If you want to go back and update your old posts with this new “read more…” feature you can. Just go back and edit each post manually. Essentially you’ll need to paste in the <span class=”fullpost”> and </span> tags breaking apart the post into two parts.
For some posts, you might not want to use this feature at all. If that’s the case, just delete the <span class=”fullpost”> and </span> tags from within your new post text area. Then your new post will show up entirely just like it used to before you implemented this hack. Enjoy!
