How many lines does mouse scroll

[jmt356]

I have my mouse set to scroll 7 lines at a time.
In Chrome, it scrolls about 7 lines at a time.
In Outlook, it scrolls 6 lines.
In Word, it scrolls about .75 of a line (i.e., less than one line) at a time.
How do I fix this?

[HansV]

Do you use a very large line spacing in Word?

[jmt356]

I use 10 pt font with 1.1 multiple line spacing and 2 pt before and 2 pt after paragraphs.

[HansV]

That's not large. With those settings, scrolling the mouse wheel scrolls 3 lines, which is my Windows setting.
Clicking the arrows at the top and bottom of the vertical scroll bar scrolls about ¾ of a line.