I added the Double Line Icon to the draw menu, placing it next to the line icon on the menu. I did this through the "Manage: User Interface/CUI" on the ribbon tab.
in the CUI menu the "double line" icon shows up on the menu in preview, however it does not show on the working menu?

I selected "apply" then okay, nothing.
I closed and reopened AutocadLT 2018, still not working?

Any ideas?