For many applications, a map showing a feature's shape and some descriptive text is not sufficient. Precise measurements or distances are needed. Dimensions are a special kind of annotation for showing lengths or distances on a map. A dimension may indicate the length of a side of a building or land parcel, or it may show the distance between two features, such as a fire hydrant and the corner of a building.
You add dimensions to ArcGIS Pro as you would add any other data. Dimensions appear with other geographic data in the Contents pane and are drawn according to their order.
Aligned dimensions run parallel to the baseline and represent the true distance between the begin and end dimension points as shown in the following illustration:
Linear dimensions can be vertical, horizontal, or rotated as shown in the following illustration:
