Modify Source Marker

Choose a marker you want to modify.

A/ Select the marker symbol in text (selection can contain text around, it, but only as a single marker) and choose Context Menu  -> Cross-References  ->Modify Source Marker

B/ Double click the marker in the Cross-References panel -> Source Markers view

C/ Select the marker in the panel and choose Cross-References panel menu -> Modify Source Marker

The following dialog will pop up:

Change the name of the marker and indicate whether you want to keep current cross-references linked to this marker, or whether you want to break the connection. If there are any unresolved cross-references leading to the marker name you've chosen, they will be linked to the modified source marker.