Collective term for the components used to support a catenary wire or auxiliary wire. There will typically be a selection of wire support styles that you can choose between.
The below image shows an example of a wire support highlighted in purple which is attached to a mast.
In Lineardraft, you select a wire support using the 'Item' dropdown list in the 'Edit Wire' dialog, in either the 'Edit Wire' or Edit Structure' window. Find out more here.