The main tool box launches each function of the IMC.
Many functions have both a menu bar menu and a toolbox icon, both of which operate equally.
The main toolbox is usually docked in at the top of the main window, but you can dock out of the window or minimize the display as needed.
Individual main tool icons can be hidden independently.
Various windows and dialogs other than the main window also have their own tool boxes.
However, these visibility can not be changed.