Customization comes in three levels, and knowing which level a change belongs to saves a great deal of confusion.
Level 1 — your own view. The cockpit remembers your period, your chart breakdowns and grains, and whether you keep the analytics collapsed — yours alone, restored when you return. On dashboards, you compose your own: add widgets from the gallery, arrange them, filter them (§2.7). Nothing at this level changes what anyone else sees, and everything at this level is still bounded by your permissions — a widget whose measure you may not see (the margin tile, if your role cannot see costs) is not offered to you at all.
Level 2 — your company's composition. Your company administrator decides which widgets each cockpit shows the whole company, and in what order, at System Setup → Cockpits. The starting set is the one each cockpit ships with — shown or hidden, and reordered, there. Add widget goes further: it picks from the governed widget catalogue — the statistics and charts every cockpit ships with — so a tile that belongs to Finance can join the Sales cockpit if your company wants it there. A picked widget is marked Added; it behaves exactly like a shipped one (same number, same period control), and it can be removed outright, which a shipped widget never can — shipped widgets can only be hidden. Reset to shipped defaults clears every change at once, picks included. Company dashboards work the same way: an administrator composes the dashboards the company shares. Level 2 rearranges and selects among what exists; it does not invent new numbers.
Level 3 — a number that does not exist yet. If the measure or the slicing you need is not in 2.9 or 2.8, it does not exist — by design, not by oversight. A genuinely new measure has to be defined once, centrally, with its calculation written down, so that every screen and every person gets the same arithmetic. That is a product-level change: ask us, describe the question the number should answer, and if it ships it ships for everyone under the governed-numbers promise. What no level of customization will ever do is let a screen quietly compute its own private version of revenue.