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Use the “Save” option to bookmark a page. Bookmarking saves a link to the page in your online Diigo library, allowing you to easily access it later.

Highlighting can also be accomplished from the context pop-up. After the Chrome extension is installed, whenever you select text on a webpage, the context pop-up will appear, allowing you to accomplish text-related annotation. Highlight Pop-up Menu – After you highlight some text, position your mouse cursor over it and the highlight pop-up menu will appear. The highlight pop-up menu allows you to add notes to, share, or delete the highlight.

Sticky Note Click the middle icon on the annotation toolbar to add a sticky note to the page. With a sticky note, you can write your thoughts anywhere on a web page.

For sharks and Rays this is not a problem as they do not have color vision anyway. The eyes of shallow water species are adapted to have a maximum sensitivity to light of around 500 nanometres, and the eyes of those species that live in deeper waters are adapted to 475-480 nanometres. Most Teleost fish however have color vision, and the eyes of the Trout (Onkorhynchus mykiss) have three sensitivity peaks at, 455, 530 and 625 nanometres.