Use the Line Patterns dialog to create a new line pattern. 
-  Click Manage tab
Settings panel
 Additional Settings drop-down
 Line Patterns. 
 
- In the Line Patterns dialog, click New. 
 
- In the Line Pattern Properties dialog, enter a name for the pattern. 
 
- Click in the value for Type, and select either a dash or a dot. 
 
- If you selected a dash, click under Value, and enter a value. This is the length of the dash. Because dots are all drawn at 1.5 points, they do not require an associated value. 
 
- In the next row, select space for Type. 
  Revit LT requires that you follow a dash or dot with a space. 
 
- Click under Value, and enter a value for the space. 
 
- Repeat the procedure until the pattern is complete. 
 
- Click OK. 
  
In the Line Patterns dialog, the new line pattern displays in the list of available patterns. 
  
 
 
- Click OK. 
 
 
The new line pattern is stored in the project only.