The Layers panel and the Select menu provide ways to select objects by their type or a shared attribute, adding or removing matching objects to or from the current selection.
From the Layers panel, you can select all layers that share a name or an assigned tag colour.
These powerful selection methods allow you to quickly make bulk changes to your design all at once, e.g. to convert objects that share a non-global colour to use a global one.
Both commands are available from the Select menu. Each offers a range of options in its submenu.
The Select Same command selects all objects in your document that match an attribute on your currently selected object.
Select Same matches objects with the same Fill Colour, Stroke Colour, Fill & Stroke Colour, Stroke Weight, Transparency, Blend Mode, Shape, Width, Height, Rotation, Name, or Tag Colour.
Select Same can also match objects whose Width, Height, or Stroke Weight is less than, less than or equal, greater than, or greater than or equal to that of the currently selected object.
The Select Object command selects all objects of a matching type within your document. For example, you can select all groups, symbols, art text, frame text, path text, picture frames, tables, data merge layouts, objects according to their fill, stroke or opacity, and so on.