It is possible to add new buttons to Opera with drag'n'drop. You can share your custom buttons as links on a web page, and visitors can drag the link to create a button on a toolbar. On clicking the link (instead of dragging it) a button will be placed on the 'Buttons > My buttons' panel of the 'Appearance' dialog.
You can also drag links from a web page to create search fields or search buttons. See the separate page for custom search fields and buttons.
Note: this page has been updated for Opera 8.5, not all buttons function correctly in Opera 7.x.
This special type of hyperlink is recognized by Opera:
<a href="opera:/button/<action text>" title="<default button title>"> Clickable and draggable link</a>
Replace <action text> with the button action. See the toolbar.ini and keyboard.ini files for examples of the actions that can be used (an action is the part after the
= sign). Replace <default button title> with the title for the button. It is not yet possible to use custom images, but you can reuse images defined in the existing skin.