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3.9 Undo
The corresponding icon on the toolbar ， deregulation of the
current file on one step operation, the shortcut Ctrl + Z.
3.10 Restore
The corresponding icon on the toolbar ，on the recovery of the
current file step operation, the shortcut Ctrl + R.
3.11 Shift
The corresponding icon on the toolbar
graphics editing the mobile location.
3.12 Zoom in on all objects
，The overall current
The corresponding icon on the toolbar
area all objects can be maximized.
，in a graphical editor
3.13 Shrinking all objects
The corresponding icon on the toolbar , display all the objects
in graphics editing area can be minimized
    "