DPI stands for Dots Per Inch which technically means printer dots per inch. Today it is a term often misused, usually to mean PPI, which stands for Pixels Per Inch.
When you put a picture into edesign, and depending on how big you make it, sometimes there is a triangle that pops up that is a DPI warning because the pixels of the picture have been too stretched. When this happens, you can choose another picture or make the picture smaller, or can put it into photoshop and change the DPI. To do this, insert the image into photoshop and then press alt ctrl I and then bump up the resolution to whatever you need, usually around 500-800 depending on how big the picture is. I would recommend doing this for all theme pictures and dominant pictures.
When you put a picture into edesign, and depending on how big you make it, sometimes there is a triangle that pops up that is a DPI warning because the pixels of the picture have been too stretched. When this happens, you can choose another picture or make the picture smaller, or can put it into photoshop and change the DPI. To do this, insert the image into photoshop and then press alt ctrl I and then bump up the resolution to whatever you need, usually around 500-800 depending on how big the picture is. I would recommend doing this for all theme pictures and dominant pictures.