Categories

Categories are “cross-cutting groups that classify threads across folders and assemblies. A thread can belong to many categories at once.”

Categories vs. folders

The two answer different questions:

A folder is a thread’s single home — every thread lives in exactly one folder. See Folders.
A category is an additive label — “Categories are additive, cross-cutting groupings — a thread can belong to several at once. This is distinct from a folder (single-home).”

Use folders for where a thread lives, and categories for what it is: the same thread can sit in the folder Line 3 / June builds while belonging to the categories Titanium parts and Customer X program simultaneously.

Browse the category tree

Open Categories in the sidebar. The page shows a Categories sidebar with the tree — expand and collapse nested categories, or filter with Search categories… — and a threads panel for the selected category showing its thread count and members. On small screens the tree becomes a Select a category sheet.

If your team has none yet, the empty state explains: “Create a category to group threads across folders and assemblies. Categories can nest — make an outer category, then add subcategories inside it.”

Create categories and subcategories

Click New in the Categories sidebar (or New category from the empty state) to open the New category dialog. It reminds you that “Categories are additive, cross-cutting groupings — a thread can belong to several at once.”
Enter a Name (e.g. “Playing cards”) and an optional Description (“What does this category group together?”), then click Create.
To nest, open a category’s actions menu and choose New subcategory. The New subcategory dialog explains that nesting “lets you build an outer/inner structure (e.g. Cards → Diamonds, Clubs). A thread can still belong to several categories at once.”

Add threads to a category

There are three ways in:

From the category — in the selected category’s threads panel, click Add threads. The picker (“Add threads to name”) lets you “Select one or more threads your team owns to add to this category”, then confirm with Add to category. DICE reports the outcome, e.g. “3 threads added to category — 1 already in it”.
From a thread — on a thread’s page, use the inline Category button to open the Add to category dialog. Search existing categories, or type a new name and create one on the spot (New category) — the toast confirms “Added to category” or “Category created and added”.
From Folders — select threads in the Folders view and choose Add to → Add to category, as the category empty state suggests.

Remove threads from a category

On a thread’s page, each category chip has a remove control (“Remove from name”). Removing a thread from a category never moves or deletes the thread — it only detaches the label.

Move a category

From a category’s actions menu, choose Move… to open the Move category dialog and “Choose a new parent” for it, “or move it to the top level.” The dialog offers Top level (no parent) and marks ineligible destinations with hints: “This category”, “Can’t move into its own subcategory”, “Current parent”, “Owned by another team”, and “View only”.

Categories have Share and Access actions like folders do — see Sharing and Access.

Find uncategorized threads

The thread Search page can filter to Uncategorized — threads that belong to no category yet — which is useful for keeping classification complete.

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