Baseline dimensions are multiple dimensions measured from the same location. Continued dimensions are multiple dimensions placed end to end.
You must first create a linear or angular dimension before you create baseline or continued (chain) dimensions. By default, baseline and continued dimensions start with the most recently created dimension in the current session.
Tip: After selecting a linear or angular dimension, you can hover an endpoint grip of a dimension line to access the Baseline and Continued commands from the grip menu.