After effects CC shapes and masks out of scale

so I've had after effects installed for about a month and a half now, but all of a sudden all the masks, particles and all are out of proportion, I don't know what happened... I really need help because im showing a YouTube channel and I need to make my outro

You are probably working in a mockup that has non-square pixels. Check the settings of Composition. Try to turn on Pixel Aspect Ratio Correction in the Composition Panel. If you don't know what I'm talking about type of pixels in the field find help in the upper right of the AE and study the first 3 links.

Tags: After Effects

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