@yorik1984 said:

7mx3m=42000pixel x 18000 pixel (152 dpi). It very big picture. Yo can export to vector format PDF and use more powerfull sofwarw to convert. Or you can print poster from many small part

More powerful software like what?

I am not yet done with plan so i have nothing to test now. About the dpi, I have no background about that I was hoping to get help through this forum. It is ny graduatiin project as an urban designer and my skills in graphics are minute. Thanj you for your reply

hello,

I have this big plan I am working on sketchup and I was wondering what is the biggest PDF or JPEG size i can export of LayOut. I need to print it on a 3m x 7m poster! I have heard that really big files cannot be exported from LayOut the image or PDF will have a big size file but with a blank white page. Is't true?
If it is what is the solution for that and what is of a better quality, image or PDF? noting that it is an architectural plan and i'm going to import it into photoshop to color it and add trees etc.

Thank
AbdulMuneim