Bookmark Default Target Set in 3 steps:

  1. Press #, then 7;
  2. Edit Address field, delete everything before the javascript: part(i.e. delete ? from the beginning);
  3. For Opera Mini v4.0 or later, select your prefered Speed Dial number;
  4. Hit OK.
Then, your bookmarklet is saved! You can call it at any page by pressing *, then the speed dial number you set.