To install the Graco 4EVER 4-in-1 car seat in a vehicle, follow these steps based on the mode of use:

### Rear-Facing Installation:
1. Preparation:
- Remove infant supports.
- Store the tether strap by attaching it to the storage location on the back of the seat.
- Store the lower anchor strap in the forward-facing belt path.

2. Positioning:
- Recline the car seat using the handle at the front.
- Move it to one of the four rear-facing recline positions until it clicks into place.
- Place the car seat rear-facing in the vehicle, ensuring the base is flat on the seat and at least 80% of it rests on the vehicle seat.

3. Installation Using UAS Straps:
- Remove the InRight LATCH connectors from storage.
- Extend the LATCH strap to its maximum length.
- Push the base against the vehicle seat.
- Attach the LATCH connectors to the vehicle’s lower anchors.
- Tighten the strap securely.

4. Installation Using Vehicle Seat Belt:
- Route the seat belt through the rear-facing belt path.
- Buckle the seat belt and lock it by pulling it all the way out.
- Press down on the car seat while tightening the belt.

### Forward-Facing Installation (with 5-Point Harness):
1. Preparation:
- Adjust the car seat to forward-facing mode.
- Attach the tether strap to the vehicle’s tether anchor.

2. Installation Using UAS Straps:
- Use the forward-facing belt path.
- Attach the LATCH connectors to the lower anchors.
- Tighten the straps securely.

3. Installation Using Vehicle Seat Belt:
- Route the seat belt through the forward-facing belt path.
- Buckle the seat belt and lock it.
- Press down on the car seat while tightening the belt.

### Booster Mode Installation:
1. Backed Booster Installation:
- Adjust the seat to booster mode.
- Use the vehicle’s seat belt to secure the child.
- Ensure the seat belt is properly positioned across the child’s shoulder and lap.

Always refer to the car seat manual and your vehicle’s manual for specific instructions.