custom border color for all send objects
Is it somehow possible to have a custom border color for all send objects or any specific object?
I wouldn't know a way to automatically do it. In Max 9 you can filter for the objects you want to modify and set the patcher list view select all and modify all at once. But you still you have to do it manually for every patcher.
Use the universal object. Specifically for send boxes, you need to prefix the the message with sendbox otherwise it sends the message to the receivecounterparts.
Max Patch
Copy patch and select New From Clipboard in Max.