Selects the locators for curves.
Everything created as a Locator (including annotations, deviations, and measurements) is pickable as a locator. You can assign the locators to layers.
After you have selected
locators, you can delete them by using Delete > Delete Active 
.
Picks locators created by the Locators > Measure tools.
Picks locators created by the Locators > Deviation tools.
Picks locators created
by the Locators > Measure > Arc Length 
and Locators > Curve Curvature 
tools.
