Graphical Selection Modes
There are three graphical selection modes in SA: rectangle, circle and polygon.
Rectangle Select Mode allows you to draw a rectangle around the entities of interest, as illustrated below.
Everything inside the rectangle is either selected (or deselected), whereas the selection states of items outside of the rectangle remain unchanged.
Ensure you are in rectangle graphical selection mode Graphical selection requires a combination of the mouse and keyboard as follows:
To Select Multiple Items Using Rectangular Selection:
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Press and hold down the Shift key.
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With the left mouse button click to define one corner of the rectangular selection region and hold the mouse button down.
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Drag the mouse to the opposite corner of the rectangle, then release the mouse button to complete selection. The items selected should highlight.
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Press and hold Shift+Alt key and repeat the process to re- moved selection of a sub group of items that were previously selected.
To Select Multiple Items Using Circular Selection:
Circle selection mode is performed in the same manner, although rather than a rectangle, the two click points define either extent of the diameter line of a circle.
To Select Multiple Items Using Polygon Selection:
Polygon selection mode allows you to draw a polygon of any shape to define the selection, as depicted below where points are being selected through the use of a polygon selection marquee.
Items inside the polygon are either selected (or deselected), whereas items outside of the polygon are not affected.
To Select Multiple Entities Using Polygon Selection:
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Ensure you are in polygon graphical selection mode
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While pressing the Shift key, single-click to define each vertex of the polygon.
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For the last vertex, locate the mouse cursor where you’d like the vertex to be and release the Shift key.
To Change the Selection Mode During a Selection:
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Press the F3 key.