menu items grayed out.

[Guest]

This happens in all menus from time to time.
Menu items will be grayed out (unusable). The spread sheet is not
protected, nor the cells locked.
If I copy to another blank spread sheet, all will be fine.

 

[Guest]

If you are in the edit mode - the cursor is a vertical, blinking line in a
cell, many menu items and tool bar buttons will grey out. Also, the word
edit will appear on the status bar at the bottom of the screen.

HTH