You can create any number of issue types. Go through the following steps to create a new issue type:
- Browse to the Issue Types page
- Click on the Add Issue Type button
- Enter the name and description for the new issue type
- Select whether the new issue type will be a standard issue type or a subtask issue type
- Click on Add to create the new issue type
Once the new issue type has been created, it will be assigned a default icon. If you want to change the icon, you will need to click on the Edit link for the issue type and then select a new image as its icon.