Thank you for your request regarding the symbol modifiers and the missing symbol.
Supply / Headquarter Line
These modifiers are available in the extended library mode. Go to the Options menu and select "Extended" Work Mode activate this mode in www.symbol.army or www.map.army.
After the activation the Modifiers can be selected in the Modifiers drop down in the Symbol Editor.
Combined Arms Symbol
This Symbol is not present as a Base Symbol in the current library. However it can be created using Icon Extension Indicators (only available in Extended Library Mode). We have created the Symbol for you. You can find it using the following share links:
We do not support the Medical Roles of Care as a base symbol. However, the symbol can be created using the Icon Text Modifier. Use the Medical Base Symbol and add the number as an Icon Text:
In the current version of www.symbol.army and www.map.army '§§' stands for a line-break. This will be improved in one of the next versions of the web applications.
Here you can find a shared MilX-Layer which includes the four symbols: https://www.map.army/?ShareID=1000830&UserType=RC-1aRVaR5v