You can attach images along with other file formats to be downloaded from your page.
From the toolbar on the top click the [Insert] button and select "File...".
From the dialog box that appears, click [Add Files] to find and add files.
The maximum size for each file is 20 megabytes.
By using the Ctrl key while you select files or by dragging and selecting, you can choose more than one file to upload at once.