An Infinite clipA special animation clip that contains basic key animation recorded directly to an Animation track within the Timeline Editor window. An Infinite clip cannot be positioned, trimmed, or split because it does not have a defined duration: it spans the entirety of an Animation track. More info See in Glossary appears as a dopesheet. An Infinite clip cannot be positioned, trimmed, or split because it does not have a defined size. To position, trim, split, or perform other clip manipulations on an Infinite clip, it must first be converted to an Animation clipAnimation data that can be used for animated characters or simple animations. It is a simple “unit” piece of motion, such as (one specific instance of) “Idle”, “Walk” or “Run”. More info See in Glossary.
To convert an Infinite clip to an Animation clip, click the Track menu icon and select Convert to Clip Track. You can also Right-click the track and select Convert to Clip Track from the context menu. The Track menu and context menu are the same.