Using basic capabilities > Overview of using basic capabilities > Diagrams > Using the Explorer diagram > Isolate selected symbol and attachment
  
Isolate selected symbol and attachment
Use to isolate the selected symbol and those that are attached to it away from the rest of the symbols. This is useful if you want to review only the selected symbol and its attachments without moving it manually. Relationship lines, if any, retain their connections and are automatically moved with the symbol.
This option is available from the Format, Arrange Symbol submenu and right mouse click symbol menu entry.
When you isolate and edit a symbol, you can move them back manually or use the options on the Format menu.
See also
Using the Explorer diagram