Most likely there's no form for it coz it's just an empty window. Do you need to have multiple windows? In case you didn't know, on the General tab of General Options you can uncheck "one file per window" to get just a single window.
If you're going to stick with multiple windows I doubt if you can change the initial default size but you can probably write a macro to set the active window to a particular position and size more quickly than dragging. In the restore.e file in slick macro folder you can see the function save-window-config call write-window-data. write-window-data calls _MDIChildGetWindow to get width, height and x,y - hence you could write a macro that first calls _MDIChildGetWindow, then calls _MDIChildSetWindow with new values for width height and perhaps x,y. You would need to experiment to see if this would work.
e.g. (untested)
_command set_new_window_size()
{
int x=0, y=0, width=0, height=0, icon_x=0, icon_y=0;
_MDIChildGetWindow(x,y,width,height,'N',icon_x,icon_y);
//say(x :+ ' ' :+ y :+ ' ' :+ width :+ ' ' :+ height);
_MDIChildSetWindow(x,y,300,500,'N',icon_x,icon_y);
// or perhaps the previous line should be as follows
//_MDIChildSetWindow(x,y,300,500);
}
"say" is a debug function that will output the string to a debug window if you want to see the values.
You can bind your macro to a key or toolbar button to make resizing the window slightly faster than dragging.
width and height aren't necessarily in pixels.
Graeme