Create 3 dash line

What would be the easiest way to create a 3-dash line for a drawing?

I have a user with a need for a 3-dash line. Like a phantom line but with 3 dashes.

I know how to edit the pen-up, pen-down settings in a .lin file. But then what would be the best way to handle the new line when it is sent to the client? Would I need to create a custom line file and sent it with the .dwg files or could I edit the acad.lin file? Would the receiver run into problems with missing linetypes?

Linetypes are stored in the drawing (in a table).

You can copy and edit an existing linetype definition or create a whole new one using the Express Tools command MAKELTYPE.

The linetype is embedded in the drawing that you send to the client. You don't have to send him a copy of your .lin file.

What would happen in this scenario: Say the receiver gets Drawing 1 that has the 3-dash line in it and Drawing 2 that does not. If he wanted the 3-dash line in Drawing 2, could he copy and paste it from Drawing 1 to "import" it?

sure, you could use Design Center.

The Phantom linetype already has two dashes. Use that as the basis for your three dash linetype.

You can use Phantom definition as the template, but make sure you use a unique linetype name. To import the new linetype into another drawing, use DesignCenter as mentioned above, or simply drag-n-drop or copy/paste any object using that linetype into the other drawing.

Thanks for the help everyone!