Tumblr offers a "Read More" feature for text posts, sometimes called a "cut," which gives you the option of hiding text underneath a link. Uses for this link include shortening long posts so that they don't overtake your followers' dashboard, hiding spoilers and hiding content that can be considered not safe for work (NSFW) to keep followers from being offended or upset by your post.
Instructions
1. Open a new text post from your Tumblr dashboard, or by visiting tumblr.com/new/text. You cannot add "Read More" cuts to any posts other than Text posts; while the "Read More" line will appear in the rich text editor after you add the code, it will not appear properly on your blog or dashboard.
2. Enter the body of text that you want to appear before the "Read More" link. This text is best used to entice the reader to click the "Read More" link, and give some indication of the contents of the post beneath the link.
3. Insert "" below the text that you want to appear before the "Read More" link. This is code specific to Tumblr; it does not work on other websites. If you were viewing the "Read More" feature in the rich text editor it displays as a grey dotted line that's labeled "Read More."
4. Enter the text that you want hidden below the "Read More" link. In order to see this text visitors will have to click the "Read More" link, which will take them to the full body of the post on your blog.
5. Click "Create Post" to finish your text post.
Tags: Read More, More link, Read More link, text that, text that want