Oh and i forgot to mention that a menu command named "Paste text only" which is equal to Paste [without style] script step exist only on the Mac version (strange omission Windows-side).
Thank you for the information!
I personally solved my problem but wanted to share what i observed in order to be the only who was trapped.
You are probably aware but if not, another useful keyboard shortcut is Undo (CMD/CTRL Z) immediately after the paste.
Step 1: press CMD/CTRL V to paste the rich formatted text.
Step 2: press CMD/CTRL Z to remove the rich formatting and leave the plain pasted text.
I forget which version of FileMaker Pro this appeared. Possibly 9?
Yes, i am aware of this tip since 9 (my very first version of FM). And each time i give the tip to a customer he say : "aahhh wowww"… Explicit, isn't it ? And it was one reason why i tried alternatives.
But as you can see, the post here was more about "our side of things"...
Thank you anyway for your comment, it may help other visitor of the thread.
Greetings from Switzerland !