You’d see it in commercials, they’d demo it in stores, and it seemed to represent a sort of shift where the TV image was no longer strictly confined to the solid frame of the box it came in.

你会在许多商业活动中看到它，人们会在商店里演示它，似乎画中画技术代表着一种转变，即电视的图像不再被死死地限制在一个电视固定的框里播放。

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Also to refine that you can use the Page Up and Page Down keys to move frame by frame within the timeline, and adding shift to the mix moves you 10 frames either way.

你可以使用 Page Up 和Page Down 键来以帧为单位移动时间标尺，另外，如果想要更快移动，加按Shift。

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When the reflected light is grey it remains the same even if I shift the color of the frame.

当反射光是灰色的话，如果改变车架的色彩的话，反射光还是会保持原样。

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We've seen this before: Cars like the Ferrari 575M on our list have clutchless manual gearboxes, derived from Formula 1-style systems, that let you shift via paddles that frame the steering wheel (pull the left paddle for downshifts, the right for upshifts).

FORBES: Vehicles Feature