To begin tagging 360° images you must first upload your image to ThingLink. Click the Create button at the top of ThingLink and choose the Upload 360° option. You must have the Premium, Corporate, or School-wide account to access this feature.
Your image must be in JPEG format with 2:1 aspect ratio, and a maximum resolution of 8192 x 4096. Most 360° cameras, including Ricoh Theta and Google Street View App, will produce images that fit these requirements.
If your image is not the proper resolution this can easily be adjusted on a Mac or PC. On a Mac, open the image in Preview. Use the Adjust Size option in the Tools menu to meet the size requirements. On PC, open the image in MS Paint and use the Resize button.