Looks like you have the Place Marker on the wrong piece. Here’s how you would set it up.
----Description (whatever you want)
----Command - Support Battle (What will appear when you right click the piece)
----Keyboard Command (whatever hot key you want. For this example, let’s say CTRL P)
----(Use the Select button to browse to the Ammunition Icon)
----Keystroke to apply after placement - (whatever hot key you want. For this example, let’s say CTRL A)
Now, when you right click the Artillery Unit and select Support Battle, it will fetch the Ammunition Icon …which would look like this.
----Name - Ammo
----Value - (Starting Value. For this example, let’s say 5)
----is Numeric - checked
----Minimum Value - 0
----Maximum Value - 5
--------Menu Command (Right click command, if you want one. In this case, let’s say Shoot)
--------Key Command - CTRL A (matches the command to be sent by the ARTILLERY UNIT)
--------Type - Increment Numeric Value
--------Increment by - -1 (that’s minus 1)
----Name - (whatever you want)
----Always Active - checked
----Levels follow property values - checked
----Property name - Ammo
----Level 1 - 0 (this means your first layer would be 0 ammo)
----(Since this layer follows the property value of Ammo, and Ammo is controlled by the Dynamic Property above, you can remove all hot keys)
----Images (Image 1 would be for zero Ammo, Image 2 would be for 1 Ammo, and so one up to Image 6 for 5 Ammo)
Does Not Stack
----Select Piece - Normally
----Move Piece - Normally
----Ignore map grid when moving - checked.
Where the Ammunition Icon is located in the game does not matter. You can have it in a game piece palette, hidden window, off to the side of the board, etc. The Select button in the Place Marker trait will allow you to browse to the piece in the editor tree regardless of where ever it’s located in the game.
Also, by using the Place Marker trait, you only need to have one Ammunition Icon as the Place Marker trait does not move the piece to the location but rather creates a copy of the piece. So, you can use the Place Marker trait to create as many copies of the Ammunition Icon as you want.