- In Toolspace, on the Settings tab, expand a label style type collection. 
For example, expand Parcel 
 Label Styles 
 Line. 
  
- Right-click Expressions and click New. 
 
- In the Expressions dialog box, enter a name and description for the expression. 
Note:  It is recommended that you use a clear naming convention such as “Parcel line expression: Length in meters” so you can distinguish them when composing a label style. 
  
- Click the Insert Property button and select a property from the list. 
The property appears in the editor box. 
  
- Add functions, constants, and logical operators to complete the equation. 
Note:  Do not insert anything into the curly brackets that surround the property fields. 
 - Use the calculator buttons or click in the editor field and use your keypad to enter numbers and mathematical operators like * (multiply) or \ (divide). 
 
- Use the Insert Function button to insert mathematical functions like TAN. 
 
  
- Specify how the expression should be formatted by selecting a format from the Format Result As list. 
 
- Click OK. 
 
Tutorial Exercise: Creating an Expression