eshell-scroll-to-bottom-on-output

eshell-scroll-to-bottom-on-output is a variable defined in `esh-mode.el'.
Its value is

nil

Documentation:
Controls whether interpreter output causes window to scroll.
If nil, then do not scroll. If t or `all', scroll all windows showing
buffer. If `this', scroll only the selected window. If `others',
scroll only those that are not the selected window.

See variable `eshell-scroll-show-maximum-output' and function
`eshell-postoutput-scroll-to-bottom'.

You can customize this variable.