Devices and methods are described for performing a procedure on multiple adjacent segments of a body surface. The methods generally involve positioning a locator device on a body surface to delineate a first body surface segment. A first portion of the locator device may be moved while leaving a second portion of the locator device in place as a reference. The second portion of the locator may then be moved to reform the locator device and delineate a second segment of the body surface. Locator devices comprising two detachable portions are also described.
