Create element
First, click a button of left of diagram canvas.
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Second, drag a rectangle area, then an element would be created.
Edit logical or physical name
Click the Name of element, then direct to edit the name. To change between logical and phsical name, using tool bar the combobox. Logical and physical name can be synchronized, using menu command to change these options.
Move/resize element
These method like popular other element editor. When element get the focus, using arrow keys to move it by One pixel. During move element(s), using [SHIFT] key can restrict it(them) by Y or X.
Multi-select
Drag a area embody several element, Then appear a big rectangle contains the elemetns.

Now, you can Move/Copy/Delete these elements using mouse/Ctrl-C/Del.
When do multi-select, an alignment guide tools bar appear.

Click the button on alignment toos bar, the elements are reordered.The order type world be the follow: Horizontal, Vertical, around on left/right, around on top/bottom, around arc, 45°line, 135°line, ect.
Move canvas
Strike [SPACE] key when left button down, to move canvas, like Phptoshop. Or edit the area of status bar to change view port.
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Using F3 or click the eye on right-bottom to navigate entire diagram canvas.
Using mouse wheel also move canvas by Y. Same time strike [SHIFT] move canvas by X. When diagram get focus, you also use arrow keys to move canvas by One pixel.
Esay to create System
Right button drag a area then will be create a System and the System will contain element(s) in the area.
