Looking for an idiom/expression...

[shabani]

To make it more clear, the word "margin" in Persian is used figuratively as things in any context, particularly in formal ones, which would seem less important or not worth talking about or spending time on. We do use the literal version of it as well, meaning the edge of an area(obviously the part not many people pay attention to).

[BobK]

I suppose this could be the right word for 'margin' in my example. And, in case there wasn't any word-to-word equivalent, it can well convey the meaning, to my understanding. Thanks for the word.

In this context we do sometimes talk about 'marginal issues' or 'things of marginal interest/on the margin'.

There is an academic word for things written (by hand) in the margins of a (normally) printed book: 'marginalia'. But this wouldn't fit in your context (in fact it's not relevanmt at all, so I'll shut up. )

b

PS Please ignore my 'ghost-post' - which I edited to make this one. I was being unusually dense, even for me

b

[Mehrgan]

Many thanks dear Bobk! And, I'm happy I've learnt the new word 'marginalia' too! Best!

[pandovic]

How about
It's no skin off my nose.
Hope this helps.

It's no skin off my nose is used when you don't mind doing something, not when you want to avoid being drawn into something. An interviewed footballer or office employee who doesn't want to answer too many questions might say "I'm just here to do a job". I can't think of anything better for now.