To insert a picture on your wiki page you first need to find the picure you want. Hit the edit button and click the image of the tree. Browse your computer to find the picture you want, click open, and then scroll down and click "upload" If your file does not upload, it may be becuase it is to large, or becuase it has strange character in the name. Try renaming the file or re-sizing it. Hit insert and resize image if neccisary. You can right click and go to image properties to change many things like adding borders. You can change your alignment, which is where your text is located in relation to your photo. When your done hit insert and make sure your page is how you want it to look.