The Add New Torrent dialog allows you to change several options for the torrent job before it is added to your torrent jobs list. This dialog is displayed only if the relevant option is enabled in the Preferences. Files selected/deselected in this dialog can be deselected/reselected in the Files tab's context menu.

When adding magnets, you can choose to wait while µTorrent retrieves the torrent information (a temporary message  "waiting for torrent information"  will be displayed while waiting.

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Name

Torrent Options

Torrent Contents

The Advanced... button brings up the Torrent Properties dialog.