Smooth scrolling displays each line sent to the Terminal window immediately, rather than storing it in a buffer. This results in scrolling that is more pleasing to the eye, but is slower. The default is smooth scrolling disabled. To enable smooth scrolling:
If the Global Options dialog box is not displayed, choose Global from the Options menu.
Click the Smooth Scrolling button and choose the type of scrolling you want:
Disabled (the default) disables smooth scrolling.
Enabled starts smooth scrolling.
Click OK at the bottom of the Global Options dialog box or press Return to save your selection and exit the window.
To save your selection and retain the window, click Apply.