How to change DPI in Illustrator for real? (Not a raster effect DPI)

[galynap43472327]

The raster effect set to 300 dpi does not affect the appearance of the vector. It such a file (whether it is started for print or for the web), you can draw rectangles with precise numbers of 1 inch and 300 pixels (or points). They differ in size 4 times instead of being equal because 300 dots per inch is set. Measurement in inches converts into a screen resolution of 72 dots instead of 300.

Is there any way to get a 300-pixel object upper as 1 inch in Illustrator?

[Doug A Roberts]

You need 300 PPI raster image exports?

Set your document up at the physical size (inches or mm, not pixels) you need, and use 300 PPI when exporting.

[Ton Frederiks]

If the one inch image has a resolution of 300 ppi, it will be displayed as one inch.

[Jacob Bugge]

galynap,

"They differ in size 4 times instead of being equal because 300 dots per inch is set."

Actually they differ 300/72 = 4 + 1/6 ~ 4.1667, or 1/0.24, because that is the proportion of the two resolutions.

More inaccuracies than one might think can be caused by this.

And what Doug and Ton said.