Sony DSC-RX100M3 User Giude page 24

1. Attach the strap adaptors to the strap hooks on either side of the product.
2. Attach the shoulder strap (sold separately) to the strap adaptors.
[6] How to Use Before Use
Adjusting the viewfinder (diopter-adjustment)
Adjust the diopter scale to your eyesight until the display appears clearly in the viewfinder.
1. Slide the Viewfinder pop-up switch (A) down to raise the viewfinder.
If you slide the Viewfinder pop-up switch when the camera is turned off, the camera will turn on.
If you push the viewfinder down, the camera will turn off.
2. Grasp both sides of the eyepiece (B) and pull it towards the monitor side until it clicks.
3. Slide the diopter-adjustment lever.
Adjusting the viewfinder