RasterStich allows you to combine multiple raster images into one image.
You can use the program to accomplish common tasks such as combining multiple photos into a panoramic or joining two documents that exceed the scanning size.
A tutorial is available as soon as the program starts. This will help you navigate through its various options. It's almost impossible to not use any default functions.
RasterStich's interface is simple and offers enough options to meet all of your requirements without becoming overwhelming. If you have any difficulties, the interface of RasterStich will help you get through them.