| Adobe Illustrator, InDesign, and FreeHand
are object layout applications. They handle two different kinds
of object: Vector and Raster. |
| Vectors are defined mathematically. Vectors
are resolution independent, so they can be scaled to any size
with absolutely no loss of quality. |
| Raster images are fixed resolution bitmaps
with a set pixel dimensions. Scaling a 2 by 2 raster
image to 4 by 4 reduces the number of pixels per
inch by 50%. |
| Pay careful attention NOT TO SCALE A RASTER
OBJECT so that the print output is less than 300 PPI. For a raster
image to print properly, it must be provided at 300 pixels per
inch (ppi or dpi) at the final output dimension. |