Most image editing programs (e.g. Adobe Photoshop or JASC Paint Shop Pro, etc.) have a menu at: File/Acquire or File/Import or File/Scanner that you can use to start an image scan. Sometimes there is a toolbar scanner icon too.
This menu starts the scanner’s software, called a TWAIN driver. TWAIN is a software standard that all scanner manufacturers agree to use, intended so that all image programs can operate all scanners.
If you use the image editor to start your scanner software, when the scan is completed the image can be set to open in your image editor, ready for manipulation.
Here are some step-by-step instructions on how to scan using flatbed scanners: