This is the list of extra GN4 features, related to logical groups

Create a logical group for a set of objects

See Create a logical group manually, Create a logical group automatically from library object and Create a logical group automatically when drawing with Head and Body tool.

Single-click select of all the LG members

If nothing is selected on the page, SHIFT+click will select all the members of the logical group.

Select all members of a logical group

Right-click any member of a presumable logical group, point to Logical Groups, and then click Select Group.

Display the logical group name

Right-click any member of a presumable logical group, point to Logical Groups, and then click Show Name. See Review the name of the logical group

Add more members to the logical group

Select all members of an existing logical group, and then right-click, point to Logical Groups, and then click Add to Group. See also Add new objects to the logical group and Auto-adding overlapped object to a logical group.

Magnetic captions

Hold SHIFT pressed while moving or scaling an image or placeholder with a caption, and the caption will follow the image on the new position or size. This is subject to personal preferences as explained in Allow Shift/Ctrl for extended actions.

Select a logical group by scripting

This is achieved in scripting.