How to create a space in a directory

Good evening
Do you mean to enter a name? Like, for example, Jean (space) Dupont?
Or rather like "Jean-Pierre" Durand?

What is your fixed model (brand/model)?
It should be indicated in the user manual.

Good evening

Thank you for your help.
Indeed, it is for registering compound names that I am facing a problem.
My phone is an Alcatel F330 voice duo.
The manual does not seem to address the issue, unless I am mistaken.
Best regards

Great, it worked. Thank you for your help.
It was enough, as you indicated, to press the 1 key twice to get a space.
I will impose again, and I apologize for that. The letters in the directory are dotted and therefore not very legible. Do you have a solution?
Best regards.

re
I found this:
press the caps lock key and it's done
but you still need to know which key corresponds to "caps"
it's probably a submenu when you're in the directory like pressing the pound key or lock, or often the star or zero key (long press) something like that
I also found this:
s. Some special characters can be displayed by
repeatedly pressing the "*" key (+% $ / & ( ) [ ] = the "#" key (@) or the "1" key
(- _). Press the "1" key twice to enter a space.
of course this concerns a different model but within the same brand the commands are often identical
don't hesitate to provide the solution that worked before marking it as resolved because there are several topics on this question on Google.