This is an advanced feature that applies only to groups. This feature automatically centers your grouped items vertically in your canvas. If your group contains objects with a variable amount of text, you can use this flag to always keep the group in the center of the template.
Auto Center Vertically is best for when you have a group of items, including a variable amount of text, and you want them to always appear centered vertically with even margins above and below:
Note: Any adjustments made to a group's vertical position will be ignored if this is enabled. You may also notice your layer elements moving across your canvas when added to a group. This is expected behavior and happens because your elements are being auto-aligned to the vertical center of your canvas. It's best to disable this feature to prevent this from happening.
To do this: