With 6 or 8 input/output patterns it is extremely difficult to see difference between particular I/O. This is even more problematic you use for example INT32`s or other data types that have dark color as default.
One gets few pixels of dark blue with black border around it to make things even more difficult.
- Make an Assigning Terminals mode where the icon with terminals gets enlarged eg. x4 and where all terminals are clearly visible.
- Do not add more black borders, just stick to the data type color.
- Add clear indication which controls and indicators have already their terminals assigned (general information). User by clicking can see which one is assigned to what terminal (as it is now)