&ui LEFT_ARROW create
&ui LEFT_ARROW shifts to 7 187 in zone # in 0 AND ui LEFT_ARROW scales to 0.8 0.8 in zone # in 0 AND ui LEFT_ARROW opacity 1 in 0
You could try that, obv with substituting your zone number and the shift coordinates for the other arrow. 
If it works, you’ll also need to make sure your overlays don’t overlap each other because their transparent area also counts.