Export Resolution in Adobe Illustrator


I've mainly used Photoshop before and only just picked up Illustrator a few days ago. Anyway, I used Illustrator to create lots of images (with transparent backgrounds) of different letters, each one filled with circles. More to the point, upon exporting as a .PNG, I noticed a resolution option. Me being the little derp that I am, I figured a larger resolution is always better, so I set this to high (300 ppi).

Upon importing the images into my project however, I realized that the images had become a lot larger than they should be. Upon tweaking the export resolution setting, I noticed that if I set this to low (72 ppi), the images come out as the expected size. I was just wondering how I should expect this to effect my drawings. If I were to keep the high resolution images I exported at 300 ppi, am I always going to be forced to reduce their size afterwards by a certain amount? Otherwise, should I always stick to 72 ppi in order to keep the size of the image the same and to avoid needing to re-size things later?

Image quality is not so important in this case, so there probably isn't much reason for me to use anything higher than 72 ppi anyway. Just for the sake of learning however, I thought this would be a good question to ask.

2/25/2015 10:19:00 AM

Accepted Answer

72 dpi is a screen resolution 300/240 dpi is a print resolution. neither has anything to do with physical size, it's actually how many pixels you get within that size. That's the general rule. Regarding your drawings - what do you mean size? Are your art boards planned in pixels or mm's? What do you do with them? Use them online or print them?

2/25/2015 10:52:00 AM