How does Patti use the elevator

Hint 1 of 4:

Notice the black 'building index' board to the left of the elevator.

Hint 2 of 4:

Click on it with the EYE icon.

Hint 3 of 4:

Click on the suite number corresponding to Revers Records.

Hint 4 of 4:

Now go click on the sleeping guard with the TALK icon.