Hi. I'm relatively new to indesign and I've be having this problem since i started using it. I have an image in the background and an image in the foreground but occasionally the image in the background jumps into the foreground and blocks the other image. I have idea why this happens and how to fix it. Any help would be appreciated.
Have a look at the Layers panel: (Windows > Layers).
It would really help a lot of you did some training. There are useful books, personal training and online training.
Trainsimple.com and Lynda.com have useful online tutorials, for example: Watch the Online Video Course Introducing InDesign