If you need to search where some tag (or window, alarm group, security group) is used in the application then use menu Tools / Tag cross reference (or Ctrl+Shift+X keys) to open the Cross reference query dialog.

The query dialog

Enter the name of the tag (or window, alarm group, security group) you want to search the usage.

See tag name tooltip for advanced search help.

The search result dialog

The result is displayed in a tree structure. The elements that are using the searched tag are the leafs of the tree.

When a graphic object is selected in the tree you can select it the Graphic editor by clicking the View/edit button (if a library object instance is selected then the Library object tags dialog is displayed instead).

When an animation or a script is selected then the animation specific dialog is displayed, so the animation can be viewed/edited.

For every applicable object the Substitute tags button can be clicked to open the Tag edit dialog, that enable to changed the Replaceable objects used by the selected graphic object/script.