Modify Link

Right-click component Modify            Shared Dialog Box
Modifies a link. Learn about Link and Cylinder Geometry.
 
For the option:
Do the following:
Link
Enter the name of the link you want to modify.
Radius
Specify the radius of the link geometry.
Symmetric
Enabled when you modify component pairs (or brothers):
yes - Modify properties of both components in a pair.
no - Only modify properties of the selected component.
When you modify a single component, this option is disabled because a single component is by nature asymmetric.
Select to display a dialog box where you can add multi-line comments to any entity, to describe its purpose and function. Your template-based product displays different comments dialog boxes, depending on the entity type for which you want to record comments:
If recording comments for modeling entities in Standard Interface, your template-based product displays the Entity Comments dialog box.
If recording comments for any other entity type, your template-based product displays the Modify Comment dialog box.
Learn about Recording Comments.