How do I change the dpi level to 72 for my pictures?

In Photoshop, the command is under the ';Image'; drop down menu, then click ';Image size';, then in that box change the ';resolution'; to 72.

For PhotoImpact, the command is under the ';Format'; drop down menu. Otherwise it works the same as Photoshop.

If you're not using one of those, use the ';help'; drop down menu in whatever image software you have, and search for either ';resolution'; or ';image size';How do I change the dpi level to 72 for my pictures?
use photoshop -- Image size change from 300 to 72 dpi

image will get bigger in size , but smaller in dpi. you can rescale then the overall size