Use AirDrop, Messages, Email, or another sharing option to transfer your thumbnails to your Companion computer. When editing a button, click Browse underneath the button icon. Select your thumbnail, and you will have an accurate representation of your SuperSource preset in Companion and on your Stream Deck!
Shortcut to Resize Icon from 72x41 to 72x58
Some versions of Companion do not allow uploading of icons that are not 72x58 in size. If this happens to you, use this shortcut to resize your 72x41 icons to 72x58: