Changing the Target of Topicref in DITA Map

To change the target of a topicref, do the following

In DITA Map, place the cursor in the topicref.
Call up the Change Topic Reference Dialog.
To call up the Change Topic Reference Dialog, choose DITA > Insert Topic Reference or click the Insert Topic Reference button on the toolbar.
Specify the target file.
In the Change Topic Reference Dialog, specify the target file one of these ways:
1. Select an existing file.
  From the Files list, select a file.
  
  Note:
  To filter the files by type, select a type from the File type drop-down list.
2. Enter the path to an existing file manually.
  1. In the Path field, type the path to the target file.
    
    Note:
    It is also possible to type the reference to a topic within a document, using the following format: filename.xml#topicid.
  2. Press Enter to apply the typed path.
Specify the target.
From the Targets list, select the target.

Note:
You can see the list of available targets in the current document.

To filter the targets by type, select a type from the Show types drop-down list.
Specify Attributes as needed:
1. Select a collection type.
  From the Collection Type drop-down list, select one of the following:
  1. choice
  2. family
  3. sequence
  4. unordered
2. Select a format.
  From the Format drop-down list, select one of the following:
  - dita
  - html
  - pdf
  - ditamap
3. Select a type.
  From the Type drop-down list, select a type: e.g. concept, task, etc.
4. Select a scope.
  From the Scope drop-down list, select one of the following:
  - local
  - peer
  - external
Click the Change button to change the topicref.
Click the Close button to close the dialog.
Note:
You can also check the Close on Change checkbox, and then click the Change button.