A cushion can be used to support your arms when using binoculars. The one shown in the photo is a custom arm support cushion, but any large cushion will work. Mine is twelve inches tall. The second photo shows using a desktop tripod with binocular mounts resting on the cushion.

Arm Support Cushion with Hand Held Binoculars

Desktop Tripod with Binocular Mount Supported on Arm Support Cushion.

Arm Support Cushion On Chair

Arm Support Cushion