After downloading a modpack you may customize it by changing its content.
This can be easily done by following these steps:
- Click on the modpack you would like to customize from the 'My Modpacks' tab
- Click the contextual menu (the three dots) and choose 'Profile Options'
- Check the box for 'Allow content management for this profile' and click 'Done'
- You will now see the 'Add More Content' button appear. Click it to search or browse for new mods, resource packs or maps that you would like to add.
- You will now also have the option to toggle mods on or off from the 'Installed Mods' section