Hi there,
Proxy Object is a new one to me. Reading in the Help area you may or may not be able to do anything with it unless you have to software that created the object. You might find an Enabler as was suggested but that could take a little of your time. For what this drawing is, not really a whole lot going on here, you might consider just creating a new drawing with the settings you want.
This one is kind of a bummer, sorry about that
Good luck
Please mark as a solution if this works for you, kudos are always welcome - thank you
![Screenshot - 6_16_2016 , 8_02_31 AM.png Screenshot - 6_16_2016 , 8_02_31 AM.png](https://forums.autodesk.com/t5/image/serverpage/image-id/248224i209DACE3325BCE71/image-size/original?v=v2&px=-1)
Please mark as a solution if this works for you, kudos are always welcome