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.
Dimensions are added to ArcGIS Pro as you would add other data. Dimensions appear with other geographic data in the Contents pane and are drawn according to their order.
A collection of dimension styles is associated with a dimension feature class. A dimension feature's style describes its symbology, what parts of it are drawn, and how it is drawn. Every time you create a new dimension feature, it is assigned a particular style. All dimension features of a particular style share certain characteristics, some of which can be changed on a feature-by-feature basis.
The following are the properties of a dimension feature that can be assigned based on a style:
Dimension line symbol
The symbol used for the dimension line.
The symbol used for the arrow at the end of the begin dimension line.
The symbol used for the arrow at the end of the end dimension line.
Begin dimension point
The symbol used to mark the beginning of the baseline.
End dimension point
The symbol used to mark the end of the baseline.
Dimension line display
Indicates which dimension lines should be displayed: all, begin only, end only, or none.
Indicates which begin and end symbols (arrows) should be displayed: begin only, end only, both, or neither.
Extension line symbol
The symbol used for the extension line.
Extension line display
Indicates which of the extension lines should be displayed: begin only, end only, both, or neither.
The distance between the dimension point and the beginning of the dimension line.
The distance the extension line reaches beyond the dimension line.
Value to display for the text
The actual string that is displayed for the dimension text. This can be the value of the dimension only (the length of the feature or a user-specified value); the value with a prefix, suffix, or both; or a custom expression.
Arrow fit and text fit
The adjustment in the display of the arrows and text when the dimension's length is too short to show the arrows and text between the extension lines.