You can have the casement window shown open, but there is not a swing component, as doors have. You might be able to add a swing line by attaching a custom block.
You can set a swing angle for individual windows on the Properties Palette, in the Dimensions area. [You can do this for multiple windows by selecting more than one and changing them all at once.]
You can also control this through the display settings, by setting an override for the opening percentage on the Other tab. This can be done at the system default, style or individual object level. Setting an override here will take precendence over the setting in the Properties Palette.
--
David Koch
Autodesk Discussion Group Facilitator