How do I enlarge a picture or bitmap image file?
For single images, you can open a bitmap using Microsoft paint (part of windows). Then, select the "Image, Stretch/Skew" menu item. Then enter 200 in both the horizontal and vertical boxes and click ok. This will enlarge a picture by a factor of 2.|
There are other methods if you wish to automate the process for a batch of images files there are several 3rd party programs available.
Note that the larger the picture, the more memory you will need to open it.