At System Options > CMS > Assets Browser, administrators can define which types of image and media files can be uploaded as assets to the CMS.

To add a new file type, type its name prefixed by an asterisk (e.g., "*.jpeg"). 

By default, the following file types are allowed:

Image files

• *.jpg
• *.bmp
• *.gif
• *.png

Media files

• *.mov
• *.mp4
• *.wmv
• *.mpeg
• *.rm
• *.avi
• *.xvid
• *.3gp
• *.m4v
• *.mkv
• *.swf
• *.flv
• *.mp3
• *.wma
• *.wmv
• *.wav
• *.qt
• *.ram
• *.webm
• *.ogv