edit individual icons in toolbars

[Ulas Sunar <ulashsunar gmail com>]

Hi,

I use gnumeric on linux.

How do we edit individual icons (functions) in toolbars. For example, I
want to get rid of "Print", "Print preview" from the standard tool bar
(to open a space for "Background" properties). 

Also is there a way to decrease the size of the icons in the toolbars?

Thank you,
Ulas