You may not be using all the toolbar options that are available on Notepad++ and may want to customize it accordingly. You can do it easily by clicking on the customize icon on the toolbar, when you click on the icon you will get a pop-up that will option to Add or Remove toolbar buttons. Below is a demonstration,

As you may see it gives you the option to add more useful buttons likes, Clone to Other view, Hide Lines, Fold All, Unfold All, Hide Line Number Margin, Mide Bookmark margin, Separator, Duplicate current line, Indent e.t.c.
⚡️ You can click on the Reset button to get back to the default setting of the toolbar!
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