Turn Dependency Mode on or off

When I move a symbol I want the dates to the right to move also. How can I make this happen?

When I move a symbol, the symbols the right move also. How can I turn this off?

Click Dependency Mode in the Date Related Settings section of the Dates tab.
When turned on, it will be checked. When turned on, dependent symbols (those to the right or linked vertically) will also move. When turned off, movement of one symbol will not affect other symbols.

The status bar on the lower right portion of the Milestones window will indicate either Dep. Mode: OFF or Dep. Mode: ON.