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But, since this is an easy one... the answer is 'no'. You have to make the adjustment in Photoshop. The only way you could do it in R would be to fake it by inserting a big wall-like object and applying your background as a texture, rather than as a background ... then you could reposition it.
Cheers,
Karl
One of the forum moderators • AC 26 USA and earlier • macOS Ventura 13.2, iMac Pro 10-Core, Radeon Pro Vega 64