Clicking the reference shows the complete reference information on the right side of the page. The changes you make are saved automatically. If needed, sync the changes in different Mendeley add-ins.
At the end of the reference information there is a choice to: Share this reference anonymously with Mendeley Web Catalog. If you do not wish to share the reference information with other Mendeley users, then uncheck the box here.
Subscript is marked with the code <sub> and superscript with the code <sup>, see an example below. In Mendeley Library the codes are shown as they are written, but when you cite the reference with Mendeley Cite, the characters are shown correctly in the bibliography.
Click New Collection and give a name to your collection. You can also create subcollections.
All References includes all the references in all the collections.
My Publications includes the user's own publications that they have imported into Mendeley.
You can open a document saved into Mendeley by double-clicking it. In the document you can
Choose the references you wish to save into a file. Click Export and choose the file format.
In the desktop version of Mendeley Reference Manager you can create a backup copy of your entire library: File -> Export all -> Choose the file format.