Set Selection mode on by clicking one of the three available Selection buttons.
|To select a ...||choose||and..|
|atom||click on it|
|bond||click on the bond that links them|
|rectangular region||click at one corner of the desired region and drag the mouse to the opposite corner. While the mouse button is pressed down, a guide will be displayed to aid you|
|non-rectangular region||press the left mouse button to start selecting, and draw the region with your mouse without releasing the mouse button.A blue guide line appears along the selection region. A pink line connects the start and end points.|
|fragment||double-click on an atom or bond|
|molecule||click on an atom or bond.|
|whole stucture||double-click on any part of it|
|double-click on any part of it|
To unselect all click an empty area of the canvas.
The Invert selection (Ctrl+Shift+I) will change the current selection such that everything previously unselected will now be selected and vice versa. If there is no selection , the entire image area will be selected.