Annotating, or marking up, text on a screen depends largely upon where the text is coming from. This page will help you use markup tools for readings from the library, PDFs, and websites.
Most of the Library's e-book and article databases allow you to download a PDF copy of the e-book chapter, section, or entire article. Once you have downloaded and saved a PDF version of the text, you can use a number of applications to mark up the text.
Tip: Google "pdf markup." A slew of recommendations, tools, Chrome extensions, and applications will appear. Choose the one that best fits your computer and pocketbook.
Paid apps abound. Three that I use include Notability, GoodNotes, and Evernote (premium version required for PDF annotation.) There are lots of options for both i0S and Android tablet users. As above, the search terms to use in an app store are "pdf annotate" or "pdf markup."
Perhaps the easiest way to annotate a webpage is to download or print it as a PDF, and from there, use programs and apps like those recommended above to mark up the text.
It is possible, however, to annotate a web page directly on the page.
You can take notes within eBooks as long as you are signed in to your library account. You may need to sign in a second time to ensure you are signed in to library services beyond access to books and articles. These services include the ability to save articles to a Personal Folder and to save notes.
Check the ribbon at the top of any library page. If you see the Sign In button, it means you need to sign again to access these additional services. If you are already signed in, this area will say Sign Out instead.
eBooks allow you to save notes that are specific to a page location. They do not have highlighting or annotation tools beyond the Notes feature.
Saved notes go to your Personal Folder. The notes can be retrieved and printed by accessing your Personal Folder.