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{alias:ref}
h2. Name

*ref* — Reference point

h2. Syntax
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*ref* \[*cen*] | \[*win*] | \[*dat*] | \[*poi*] | \[*coor*] | \[*loc*] 

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h2. Description

Make a reference point in the graphical window. The reference point is often used as a reference in other commands. e.g. *poi ref* will display a point at the reference point, or *rot 30* will rotate a dataset 30 degrees around the reference point. 

h2. Arguments

{indent}No argument, only the command *ref*. 
Will make the reference point equal to the cursor position.{indent} 
*cen* 
{indent}Will make the reference point equal to the center of the window.{indent} 
*win* 
{indent}Will make the reference point equal to the origo of the window.{indent} 
*dat* 
{indent}Will make the reference point equal to the minimum values of the active dataset.{indent} 
*poi* \[_point\_number_] 
{indent}Will make the reference point equal to the coordinates in _point\_number_ (default 0) of the active dataset.{indent} 
*coor* _x y z_ 
{indent}Will make the reference point equal to _x y z_ coordinates.{indent} 
*loc* _x y z_
{indent}Will make the reference point equal to the location point pluss _x y z_ values.{indent} 

h2. See also

[poi|poi - Point display] _ref_, [rot - Rotate a dataset], [txt - 3D text]
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