Under Section 25 CPC (civil cases) and Section 406 CrPC (criminal cases), the Supreme Court has power to transfer cases from one High Court or subordinate court to another.
Circumstances include:

• Convenience of parties and witnesses.
• Fear of bias or threat to fair trial.
• Matrimonial disputes where spouses reside in different states.

The transfer jurisdiction is exercised to ensure justice, equity, and convenience.