Thank you for replying.
I misunderstood the term "block comment", "block name" and "on-the-chart comment" in the last reply.
The program I am working on has no block comment, it has duplicate block names all over the program and very little on-the-chart comments. It uses OptoScript, but not in a consistent way.
The block comment is not easy to read, I need to open/close each block. I see it only helpful to put notes between lines inside a block.
The block name is the one I am trying to put ID tags, I can see the "center on block" button can list out all block names in one chart. Not globally, not exportable to sheet format. Difficult to maintain.
I am going to put more on-the-chart comments. But it is a floating object on the screen, not really attach to a block and not possible to be listed also. Difficult to maintain.
I will more focus on set up a good block name naming system, more like PLC programming, each block has its unique/changeable address. Sorry to say, but I can see it is not convenient and I am worrying the naming system can not be maintained properly between engineers, it will be very manual with lots of trivial and repetitive typing…
P.S. My PAC is at the memory limit, so we can only use PAC Control R8.2g for editing, the previous engineer says the latest version will generate a larger compiled file. But I think it is no far from the latest version in term of UI anyway.