From FCKeditor Docs

Determines in what way the the toolbar will appear when loading FCKeditor. By default it is set to 'true' so the toolbar appears in expanded mode (you can see all the buttons and menus). If set to 'false' the toolbar will start in collapsed mode (all buttons hidden).

Example:

FCKConfig.ToolbarStartExpanded = true ;

See Also

ToolbarCanCollapse