To rotate using your mouse on PC:

1. Open Build Mode.
2. Select the object you want to place.
3. With the object selected, right-click to rotate the object 45°.
4. Keep right-clicking until the object faces the direction you want.
5. Left-click to place the object.

To rotate using your keyboard on PC:

1. Open Build Mode.
2. Select the object you want to place.
3. With the object selected, use the period key to rotate clockwise, or the comma key to rotate counter-clockwise. This will rotate the object 45°.
4. Left-click to place the object.

To rotate on PlayStation:

1. Open Build Mode.
2. Select the object you want to place.
3. Press R1 to rotate an object clockwise, or R2 to rotate an object counter-clockwise.
4. To place it, let go of R1 and R2 when the object is facing the direction you want.

To rotate on Xbox:

1. Open Build Mode.
2. Select the object you want to place.
3. Press RB to rotate an object clockwise, or LB to rotate an object counter-clockwise.
4. To place it, let go of RB and LB when the object is facing the direction you want.

To rotate using your mouse on Mac:

1. Open Build Mode.
2. Select the object you want to place.
3. With the object selected, click the right mouse button.
4. Now press the right key on your keyboard to rotate the object 45°.
5. Click the left mouse button to place the object.

To rotate using your keyboard on Mac:

1. Open Build Mode.
2. Select the object you want to place.
3. With the object selected, use the period key to rotate clockwise, or the comma key to rotate anti-clockwise. This will rotate the object 45°.
   
4. Click the left mouse button to place the object.

How to rotate objects freely in The Sims 4

If you want to make more subtle rotations when building, you can rotate freely. This only works when you’re rotating using the mouse, not the keyboard.

To do this on PC and Mac:

1. Open Build Mode.
2. Select the object you want to place.
3. Using the mouse, left-click and hold the object.
4. Hold down the ALT key as you move the mouse, turning the object.
5. Let go of the left mouse button when the object is facing the direction you want.

How to rotate freely on PlayStation:

1. Open Build Mode.
2. Select the object you want to place.
3. Hold down L1 and R1, and rotate the item using the Right Analog Stick.
4. Let go when the object is facing the direction you want.

How to rotate freely on Xbox:

1. Open Build Mode.
2. Select the object you want to place.
3. Hold down LB and RB, and rotate the item using the Right Analog Stick.
4. Let go when the object is facing the direction you want.