improving the properties of the control measure symbols (line- convoy)
The properties of the symbols for control measure symbols for line (convoy) objects should be improved, since not all amplifiers can be filled in according to 2525c or 2525d:

Proposal for the content and structure of the property window (named "CM - Line (Convoy)" for control measure area symbols:

Remarks:
The green marked amplifiers correspond to the specifications according to 2525d.
For the symbol icon (field "A") in the arrow the user should be able to select the required vehicle symbol from a predefined drop-down list.
The symbol "change symbol type" should only be used here so that the user can quickly switch between "moving" and "hold" convoy without the user having to create a new symbol and thus discard the previous entries.