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Use full caps for a film or theater but initial caps only for Imax Corporation.

Be cautious when using IMAX; only Imax Corporation produces IMAX films.

National Geographic large-format (or giant-screen) films may be produced using IMAX equipment and are often shown on IMAX screens but should not be called IMAX films.

Use large-format film or giant-screen film when referring to a National Geographic production.