The newer method using your WordPress Admin panel:
- Download the ZIP package from WordPress.
- Log into your WordPress Dashboard and click on Appearance > Themes.
- Next click on Install Themes then click on Upload.
- Click Browse then locate the file named Longform.zip and click Install Now.
- After the theme has installed click on Activate Theme and you are all set! Longform is now installed!
- If you prefer to manually upload the theme through FTP you can simply copy the Longform folder from the downloaded ZIP package into your themes folder.