Onyx system enables you to arrange your notes in tags, also known as categories. Each tag can be a word or a sentence of up to 40 characters, that will be a subject or purpose, that notes can be associated with. To manage your tags, from the top bar, click on Tags Manager   , and you will have the list of all your tags. If you want to see all of the notes that are associated with a tag, you can click on a tag's title in tags list, or from Main page, click directly on a tag in the Tags Cloud. Note that in the Main page, tags number is according to your preference and can be set in Settings page. Therefore, in case you don't see the tag in Main page, look for it in Tags Manager. In Onyx, you can see all notes that are related to a note by opening the note in Note Viewer, and if the note is associated with a tag, you can click on the tag, and see all the notes in Results View on Main page, thus keeping and managing your related notes in one view.