The Ranges & Marks List is a tab in the Editor Lists area on the right of the Editor window. If the editor list area isn't visible it can be enabled by checking View > Show Editor List. The Ranges & Marks list can be used as a single point of control for all range and location markers (including the punch and loop ranges), or as a supplement to other methods of working with them.
Each section has a set of editable clock widgets which display the location of a marker, or the start, end, and duration times of a range, respectively.
The Use PH buttons allow you to set the corresponding clock to the current playhead position. A Middle click on any of the clocks will move the playhead to that location. Both functions are also available from the clock context menus.
Right clicking on any of the clocks brings up a context menu that allows changing of the display between Timecode, Bars:Beats, Minutes:Seconds, and Samples.
The — (subtract) button in front of each user-defined range or marker in the list allows that particular item to be removed. The name fields of custom ranges and markers can be edited.
The Hide checkboxes make markers and ranges invisible on the respective ruler to reduce visual clutter; the markers remain active however, and can be used normally.
Selecting Lock prevents the respective marker from being moved until unlocked. Where applicable, Glue fixes the marker position relative to the current musical position expressed in bars and beats, rather than the absolute time. This will make the respective marker follow changes in the tempo map.
At the bottom of the list are buttons to add new markers or ranges.