Yves,
You do have to make a new line type with the dash and space
you want but, if you copy a line set to the new line type and paste
it into any project and/or your project template (.tpl) and then
delete it you will have the new line type available in any project
that you have pasted the line into.
Alternatively, If you have the line type in any project you can
in any other project, open attribute manager and append the
line type into the project using the line type attribute from the
project that has the new line type.
Peter Devlin