Description window

The Description Window is a text editor that can be used to create and edit a description of the model. The title bar of the Description Windows says "Model description".

If the Description Window is not visible, it can be turned on from the main menu, like all other windows: View - Windows - Show description window.

The text editor has only the absolutely necessary functions to create simple texts:
 * Entering text from the keyboard
 * Delete individual characters or markers with backspace or ENTF
 * Set input cursor with the mouse or move with the arrow keys
 * Mark text with left mouse button, or with SHIFT and arrow keys
 * Mark everything with CTRL-A
 * Copy/paste with CTRL-C and CTRL-V

The description is logically part of the model and is saved with it. If the question "Unsaved changes - Save now?" is denied when closing the program or in other situations, any changes to the description are not saved.