ATHENA 2021 > Commands and functions > Drawing > Center lines
  
Center lines
Ribbon:
Tab ATHENA > Group Drawing > Center lines
Menu:
ATHENA > Drawing > Center lines
Toolbar:
ATH Drawing and ATHENA Drawing
Command input:
ath_dimcen
With this command you can produce the center lines of a circle or arc. Center lines are ARX objects which are associatively coupled to the respective circle or arc.
When you start the command, the following appears:
ath_zent
Center lines
Input request 
Overlap: 4
Select arc or circle or [Settings/?]:
The current overlap is displayed. Select the arc or circle for which center lines are to be created.
Use the Option Settings to change the overlap or the layer of the center lines.
With the option ? you call the help.
Option Settings
Dialog box Center lines
db_ath_dimcen
Dialog box section Properties
Overlap
Defines the length of the overlap of the center line.
Use radius
Uses the radius of the selected circle as the overlap.
Dialog box section Display
Layer
Opens the Dialog box Layer assignment. The default layer for the axis line may be overridden here. You will find further information in the section Layer assignment.
Note 
• If you move the circle or change its radius or diameter, the center lines adapt automatically.
• To carry out changes to the center lines, you can double click them.
• You can define the layer default settings for the center lines in Dialog box System layer under Dimension.
• You can define the default for the overlap in Dialog box ATHENA options under Settings.