New to Knitting and need Help!

I’m about 1/2 way done with a baby blanket and I noticed that I have about 4 rows that I need to remove. How do I do this? Is there a video out there that I can watch how to remove rows and then put the remaining back on???

Thanks so much!

Under tips in the video section here you can see a video for various types of methods. If you are concerned about losing stitches you can use finding the destination row.