Hi All,
I've recently started learning how to design custom PCBs for a home flight simulator rig and so far I think I'm getting the hang of it. However, there is one thing I'm not able to solve by myself.
How do I change the size of a PBC border? For example, I'm trying to reduce the total width of my custom-shaped PCB by 5mm but I'm really struggling. I've managed to group the border lines thinking I'd be able to simple change with width of the grouped-component but I'm unable to. Failing that, is there a 'scaling' option (ie something that allows me to reduce the entire size of the PBC by Xmm?
Thanks
Brand new interactions and interfaces. 
Easy to use and quick to get started. 
You can either resize and reposition the lines making up the Board Outline individually using the start and end XY attributes of each line
Or:
Use the Board Outline Tool:
https://docs.easyeda.com/en/PCB/Board-Outline/index.html