The work area (user interface) > Selection tools > Select labels
  
Select labels
There are several types of labels you can select.
You use the elements area to select types of labels. For example, when in Taper, you can open the Select tool, click Labels, and by clicking on Angle in Elements, you can narrow your selection to angle labels. By clicking off Angle you will return to the general selection mode. You can now click another type of label.
To select all...
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Dimension labels
Dimension
Distance labels
Distance
Angle labels
Angle
Radius labels
Radius
Text labels
Text
Specify the selection method for labels
There are five selection methods for labels:
All Labels - This option selects all labels of the specified label type.
In WP - This option selects all specified 2D labels that are in the workplane you specify.
In WP Set - This option selects all specified 2D labels that are owned by the workplane set you specify.
In Assembly - This option selects all specified labels that are owned by the assembly you specify.
In Part - This option selects all specified labels that belong to the part you specify.