Final answer:
The Properties panel or Motion Editor is used to modify properties of a motion tween in software like Adobe Animate. It allows for adjustments to settings like ease, position, and rotation, which are crucial for creating smooth animations.
Step-by-step explanation:
The panel used by a content author to modify properties of a motion tween in animation and web design software, such as Adobe Animate, is commonly referred to as the Properties panel or Motion Editor. This panel allows the user to adjust various settings related to the motion tween, such as ease, position, rotation, scale, color effects, and more. To edit the properties of a motion tween, the author typically selects the tween on the timeline first and then the relevant options will appear in the Properties panel or Motion Editor, where they can make their adjustments.
Using the Properties panel, a content creator can fine-tune animations to create smooth and dynamic motion. By adjusting properties like easing, authors can make the motion more natural, and by tweaking position and rotation increments, they can ensure that objects follow the intended path precisely. As a result, mastering the use of the Properties panel is essential for producing high-quality animations.