Help:File

Files are contained in the sixth namespace, the File namespace. Files can be uploaded using Special:Upload, but only by autoconfirmed users. Choose a file to upload, then choose a name for the file. The file name should contain the subject's name. Files can be added to an article by creating a link to the file in the article. Additional parameters to the file include size, the change of the image's dimensions, "thumb" if the image is to be a thumbnail image, and alt text. This page is a tutorial on how to make files appear:

Tutorial
To make an image appear on an article, link to the page containing it, starting with  and ending with the image's file format. Audio can be made to appear in the same way, although the use of listen is preferred.

This produces an image with no frame and at its original resolution, which is generally not a good thing. To fix it, put  after the file name, which will turn it into a thumbnail.

It is possible to add a caption to a thumbnail by putting text after another vertical bar.

Finally, it is possible to change the size of images and their position on the page with additional pieces of text before the caption. For example,  will make the image 100 pixels wide, with 200 being the default size, and   will place the image on the left of the screen. and  also work, and right is the default position.

An alternative way to show images is in a gallery. Galleries display images in small sizes in a grid. To make one, wrap a section with  at the start and   at the end, and place each file name, without the   prefix, on a new line. Image captions can be placed after a vertical bar.