Select the menu
"Turning | Turning | Breaking edges" or click the 
icon.
If there are
several parts, indicate the part to machine.
Select the tool
to use for the operation.
Select the edges
to break or click the button.
With this button, TopSolid'Cam searches all the edges which can be used
with the current tool. Of course, after it's possible to select / unselect
some edges.
Specify the different
parameters in the tab dialogue box which appears.
Enter the comment
which appears on the machine block listing meant for the NC operator.
This comment will also appear when the user wishes to take a look at or
modify an operation, using the Operation/ Operations manager function.
Eventually, enter
a codified remark which will be interpreted by the post-processor, in
a specific manner predefined by the user and the post-processor redactor.
Validate entries
made into the dialogue box by clicking on OK.