To enter level mode, activate the draw window menu and from it select the 'object' option. Selecting either the 'Level up' or 'Level down' option puts you into level mode. The difference between the 'Level up' and 'Level down' options is that action of the right and middle mouse buttons is swapped. This is a concession to two mouse button users. Having entered level mode, press and hold down the left mouse button, and move the mouse over the objects in the draw window. You will notice that the objects become selected and deselected as the mouse passes over them. When you have selected an object that you wish to move forward or backward, while holding down the left mouse button, press and release the right mouse button or the middle mouse button (if your mouse has one). The selected object will become solid and move either forward or backward relative to the other objects being displayed. You can continue to select and change the level of other objects in the draw window by simply moving the mouse to an object and repeating the right or middle mouse button click. Now release the left mouse button and you have finished. Remember that you are still in level mode however.Throughout all of this you should have noticed that the mouse pointer has a tag associated with it (it is part of the mouse pointer and follows the mouse). This tag sometimes shows a number and sometimes is blank. In fact it only shows a number when an object has been selected and is only blank when no object has been selected. The number shown is the current level of the selected object. If you change the level of the object (as described above) the number will change. It will get smaller if the object is being moved backwards, and bigger if it is being moved forwards. The combination of this tag and the highlighting of selected objects, allows you to check the level of objects near other objects and quickly decide which objects should be moved backwards or forwards. Keeping the level number on the mouse prevents you from having to continually look away from the object and down to a status display. This makes using it more comfortable.