Adjust camera position with the right mouse button.
Double-click to enter the fullscreen mode.
On mobile devices swipe to rotate.
On mobile devices pinch two fingers together or apart to adjust zoom.
On mobile devices 3 finger horizontal swipe performs panning.
On mobile devices 3 finger horizontal swipe performs panning.
These are frame spacers for the simplex type beehive. You can use them for broodboxes and honey supers. For the broodboxes, I think the bottom spacers are required since the frames are much longer. For the honey supers you only need the top spacers. Commercial spacers are basically a strip of metal you cut to length, but they lack the capability to position the frames in the middle of the box and distribute the bee space equally between sides.