Right clicking on the object's interface window brings up a popup menu. Here you can set the current font, set the current foreground/background color, and set the amount of the display to show the history buffer in. By default the window uses 50% of the lines to show history in, so any incoming data is still shown in the bottom portion of the window, while the history can be browsed in the top portion of the window.
Any change in the font of a window is saved for any window create for an object of the same name, the same font is used.
The Default font - on the main menu of the interface, there are options, one of the options is to set the default font for any new window created.
The same command history keys work, up arrow recalls the previous commands... (see console plugin for more information)