That shows a column "Mode"

[kraimon]

That shows a column "Mode" and why utorrent some parts downloads in a mode as high-speed, and others in a mode as slow. What it is necessary to make in utrorrent that it downloaded only in a high-speed mode or only in the slow?

[DreadWingKnight]

There's nothing you can do to directly control that mode.

[Switeck]

That has to do with BitTorrent protocol negotiations between peers. (and seed-to-peer)

Using BT streaming, setting first/last parts to higher priority, or using file priority for multi-file torrents makes you more likely to be using SLOW mode because uTorrent isn't seeking out only rarest-first pieces.