Delete Everything(the rest of the text) after a specific string

Question

How can i delete Everything after a string like 'gnirts'. this might give you a better understanding: Before

and after

Answer 1

Using find and replace:

1. Hit CTRL-H to open the Replace dialogue box
2. enter gnirts.* into Find what
3. leave Replace with empty
4. Select Regular expression and .matches newline
5. Click on Replace