Hi,
are you sure that you are using 'Symmetric Offset'? The description makes
me think that you are trying to use the function 'Symmetric Relationship'
When this function is activated a previously defined 'Symmetry Axis' will
show up possible the projection of a plane which is displayed as line. The
line will get highlighted and carries a circle.
Offset will take a single element or a chain and offset this by
a certain amount.
sym. Offset will take only an element and will offset this by a certain
amount to both sides of that element and will treat both ends to
what has been defined by the user (specified on a pop-up window)
Typical use is to create a keyway
Set Symmetric Axis will define a symectric axis to be used later on
Symmetric Relationship will make two single elements symmetric in size
and distance to a previously defined symmetric axis
The icon for symmetric offset should show a red corner that
is surrounded by a thin black line
dy