Improving the properties of the control measure symbols (area - ACA)
The properties of the symbols for control measure symbols for area (ACA) objects should be improved, since not all amplifiers can be filled in according to 2525c or 2525d (ACA = Airspace Coordination Area):

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

Remarks:
The green marked amplifiers correspond to the specifications according to 2525d.
The field "Y-Yn" in the example for the ACA (irregular) might be wrongly represented in 2525d. Since the symbol in the example also contains the word "Grid" in the line as in the circular and rectangle variants. Therefore, the analogous conversion with the field "H" is proposed.
The display of irregular, circular or rectangle variants of the ACA symbol should be made possible via the respective selection (none, width or radius). The details of this are still to be worked out separately.
No "Change Symbol Type" necessary, because this information is only available for ACA-symbols.