Click on the 'Browse' button, select a file from those available on your computer, fill in the fields for any desired information such as 'Title' or 'Author', then click the 'Add File' button.

Continue adding files to the 'Pending Uploads' list as desired. Click on the red 'X' to the right of a pending upload to remove it from the collection. When you have finished choosing files to be uploaded, click on 'Upload Pending Files' to add the selected files to the gallery.

Note: If you navigate away from this page, you will have to re-select the files to be uploaded.