Use Modify Block to open a dialog where you can resize and rotate the selected block.
To Open the Modify Block Dialog
-
Select the block, then choose Object > Modify Block.
In the Modify Block dialog you can change the height and width of the block, or rotate the block. The changes are made when you click OK.
Click the lock button to adjust dimensions proportionally (lock closed 
) or non-proportionally (lock open 
).
Size
Adjust height and width separately, or select Lock to change them proportionally. The size is given in millimeters, and as a percentage of the size when the dialog was opened.
Changing the Size
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Enter a number in the height or width number box.
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Use the arrows to increase or decrease the height or width.
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Select Lock to automatically resize height together with width.
Rotate
Rotate the block to the desired angle.
Rotating the Block
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Enter a number in the rotation angle number box.
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Use the arrows to increase or decrease the angle of rotation.
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Drag the rotational slider to rotate the block.