Issue in showing product dimensions and another issue in resizing specific column width

Hello,

I have an issue in developing my own PDF template for proposals. I’m not that very good in PHP coding but still I guess with some documentations and tutorials, I could achieve what I need. However, I’m stuck a little bit in understanding how these PDF generation templates really works.
I’m trying to add product dimensions to 3 separate columns (length, Width, and height).
I’ve created my own module, copied cyan template into my propal module and renamed it to my own. Till now, all is good. I’ve reached the ranks section when I successfully added my length column but dimensions aren’t showing per each line.
I’ve asked chatgpt and I got some info on how things work but still not succeeded in getting this job is done.
All that and I’m still scratching the surface and it’s giving me a headache.
Another issue I’m facing with complementary line attribute I’ve created. That one is showing perfectly but I can’t resize the column as I don’t know how.
It would be helpful if anyone could guide me how to get things done in a easier way or if there are some tutorials online to teach how these things work together.

Awaiting your kind response.
All the best
Sameh Hosny