The t command allows you to change the type of a partition. For example, to change the partition type of partition 2 to Linux LVM : Command (m for help): t ...
You can start the fdisk utility and use the t command to set the partition type. The following example shows how to change the partition type of the first ...
Basically, Pressung the l key to Show available Partition types opens a File with the system Pager (usually less). To Exit less you have to Press the q Key.