Public bug reported:

When you use the text editor, gedit, the web browser, firefox, the e-mail 
reader, thunderbird, the file manager, nautilus, the word processor, writer of 
LibreOffice, and more in general every window having a scroll bar, tipically on 
the right side, in all these Ubuntu applications there is a good problem as 
user experience.
This because, in example, to choose the a new font in writer when you click 
with the mouse in the scroll bar on the right, the page jump to the page 
clicked without show the fonts page by page (that obviously is of the size of 
the list of the showed fonts). In example, this happen even during the 
installation of Ubuntu when it's necessary to choose the language. This happen 
even in the window of thunderbird where, clicking on the right scroll bar, the 
user wants to see the e-mails page by page thus a little at the time, otherwise 
is quite impossible to use the scrollbar and the user is forced to use the 
arrow on the keyboard scrolling the e-mails one at the time.
More, the function should not be a horizontal line with a fixed speed but an 
incrased and decreased speed like a gaussian shape 
https://upload.wikimedia.org/wikipedia/it/b/b3/Gaussiana_chauvenet.jpeg
or if you prefer another shape as speed profile but should be delicate, 
proportional, in\decremental and smooth.
If you don't want to loose the capability to jump at the end of a window with 
the scrolling bar, jumping thousands of pages, you could put an option on the 
top of the scrolling bar to choose the kind of user experience "jump to this 
page" or "scroll page by page". In example, in nautilus, if you have thousands 
of pages you could highlight on the right scrollbar the letter (or number) 
where will start the page where you are going to jump.

** Affects: ubuntu
     Importance: Undecided
         Status: New


** Tags: by page scroll scrollbar scrolling window

** Tags added: scroll

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https://bugs.launchpad.net/bugs/1863354

Title:
  exact scrolling

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