In GReader there is a "General section". You can add various notes and links to external resources. For the last action in the documentation for the GReader, a link is suggested that can be added to the bookmarks, and then when you click on it (the bookmark), a window for adding a new note will appear. But looking for the right bookmark is not very convenient.
In the Opera browser, it can be made more convenient and easier:
In conf. In the
[Document Popup Menu] section, you can add the following entry (one line) to the Opera menu file:
')
Item, Add to GReader = Go to page, "javascript: var% 20b = document.body; var% 20GR ________ bookmarklet_domain = 'http: //www.google.com'; if (b &&! Document.xmlVersion) {void (z = document.createElement ('script')); void (z.src = 'http: //www.google.com/reader/ui/link-bookmarklet.js'); void (b.appendChild (z))}} else {} "
(that it is necessary to make a copy of it, I hope everyone knows before making changes to the conf. file).
The result is shown in the picture:

Now being on the page, information about which you want to add to the “General records” you just need to call the context menu and get to the desired item.