Yes, the Nuna EXEC has 8 different recline settings - there are 4 recline positions when in rear-facing mode and 4 when in forward-facing mode! The blue positions 1-4 are for rear-facing use; the red and purple positions 1-4 are for forward-facing use and for booster use. The recline position must be set prior to installing the seat.
The EXEC is designed with multiple recline positions to provide comfort for your child and to accommodate different vehicle seat angles. The recline feature helps ensure that your child is in a safe and comfortable position while traveling.
Page 30 and 31 of the EXEC manual detail about the recline: