How do i change a picture on wikipedia?

First, you need to log in. Then from the menu on the left (under the blank) select upload file. Browse your computer and upload the file you wish to. This will also give you several choices as to where the picture came from. You will need to rename the file as well as describe where it came from. Then when you go to the edit page, change the file name to whatever you named your .jpg. i.e... if you named your file divix.jpg, then change whatever the current image is to divix.jpg. You can do a 'show preview' to make sure the picture is the correct one. So if the coding is: Image=Caption.jpg Change it to: Image=divix.jpg Good luck!

Well, first you have to know the picture's name, ex: File:Example.jpg The file of course has to be already uploaded to Wikipedia of Wikimedia Commons. Next, in the page you're editing, find the place in the coding where the picture you want to change is. Let's say that picture is called File:Money.jpg You would see somewhere in the coding: [[File:Money.jpg]] To change the picture to "example", you would change it so it reads [[File:Example.jpg]] There are other parameters that can be changed like alignment and size, but this is just the basics. Read http://en.wikipedia.org/wiki/Wikipedia:Picture_tutorial Hope this helps! =)