Does anybody know how to resize background?

Community
2

Are these hidden backgrounds or something?

Never seen these before but here you go:

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4F343019-CB5E-407D-8DF7-F9513A960500.jpeg1920×1136 802 KB

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23C57D67-FC0A-47E1-B2AE-4ECF8E927D75.jpeg1920×1136 670 KB

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2EC4EF77-71A1-41B2-9EAA-9F1A07412B3D.jpeg1920×1136 507 KB