Say I have a 10 pin connector. I have inserted a symbol for 5 of those pins (A-E). Now I want to change that symbol to show 6 of those pins (A-F). I don't want to lose the mnemonic info. How do I update the symbol? I thought at one point I could delete the symbol and reinsert it and it would keep the data associated with it. However, I just tried that and I lost the data.