Being right about the market is not the same as picking the right fund to express it. Every tile here is one fund. Choose a tab for the part of the market you are looking at, then use the two menus to decide what makes a tile big and what its shading means — cost, concentration, or how much of it you already own. Click a sector to open it on its own; click any tile for the full brief.
A bigger tile means more of this. The default is the money investors hold in the fund itself, not the market value of the companies it owns. Very small funds are floored at a clickable minimum, so the tiniest tiles are drawn slightly larger than their true share.
Pale to dark, scaled against the funds currently on screen rather than a fixed threshold. Dark marks the worst of what you can see. The number printed on each tile is the absolute figure.
Shading shows how much of each fund is already inside this one. Dark means you would be buying the same companies twice. Compare within a sector: two funds from different sectors read 0% by construction, which tells you nothing.
Drag it. Costs compound, so a fund that looks harmless over one month can consume most of a position over ten years.
Also matches the underlying asset, the issuer and the wrapper type. Matching tiles stay solid while the rest grey out, so the whole map stays on screen. Searching covers the tab you are on.
Click to switch a whole category off, e.g. hide everything leveraged.
Narrow screen: the map is stretched taller so tiles stay readable. The table view is easier here.