One could create commands inside the CUI to do just as you request.
a) Create a command inside the command list pane (lower-left pane).
The macro should read something like this: ^C^C-layer;Make;Line;;Line;
b) Assign the command a image [optional, depending where you plan to place it].
c) Populate the user interface (UI) by dragging and dropping the command
into any one of these areas (top-left pane): Toolbars, Ribbon, Menus (and/or
Screen Menu). One can also populate a Shortcut Menu area, Quick Access and
Double Click Actions (untested).
Downside to this method - clicking a UI element to start (and not using the keyboard).
???
Scot-65
A gift of extraordinary Common Sense does not require an Acronym Suffix to be added to my given name.