How to extend artboard export size?
Hi people!
I am doing a mockup of a PDF Presentation for mobile. Here is the image. It is a regular size for a short landing page, nothing extrordinary really...

The artboard size is 1080 px wide for 14,000 px long. I read in some post that the very maximum exporting size of an artboard as PNG or PDF is 5050 milimiters (or 14,300 pixels). Is there any way... script, third party software or app that i could extend this Artboard or the general WorkSpace? I need an extra 1000 pixels to add a photo.
I suppose i could reduce 50% everything but is it not the same as working in the right resolution.
Thanks for any help or ideas, i am really stuck with this issue.
Best,
