Simple things to remember about Tags.
ALWAYS leave the default tag (the position of the little pencil icon in the Tags window) at Untagged.
NEVER* apply a tag to ‘raw geometry’ (edges and faces) but ONLY to components, groups, and non-geometrical objects such as dimensions and text.
Tags ONLY control object visibility. They do NOT separate one piece of geometry from another. That’s the role of components and groups.
Outliner presents a hierarchical view of the objects in your model - components, groups, and sections. Leaving it open in a complex model can (at least in earlier versions of SU, and to a lesser degree in the current version) drastically slow down the model.
It’s a good way to search for objects currently in your model. (But not for components that aren’t currently in use.) And once having found an object in Outliner, you can select it to highlight the object in the model, or even right click and Zoom Selection to change the model view to bring the whole object into the model window view.
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- Note: Well, hardly ever. Not at all until you know what you are doing and why you might occasionally want to do that.