The Theme Editing dialog can be used to edit user-created themes. You can modify all the properties that are stored in the theme file. To open it, you can select Preferences: Theme Organizer from the main menu of Origin and then right-click on the target theme to select Edit.
You can edit any property by clicking on the Value column and then
You can also right-click on a property or a branch of the tree, then choose Delete from shortcut menu to delete it. You can right-click on the icon of a folder (or called the tree node) to select the Add from the context menu to add more properties/branches to the tree. After you've deleted or added a property, the Total Number above this table will be updated automatically.