I can't figure how to make the webcomic wider

[Etheric-Mahes]

Hi,

I am a bit lost because I am missing a lot of publishing options on the page used to publish comics.

Here are screenshots showing the problem.

Without these options (especially full width content) my webcomic is much too thin on the page, less than half the page.

I then tried to create a normal wordpress page and integrate the buttons "next comics" and "previous comics" but it doesn't work either.

I didnt find something in settings.

Can you help me with the first problem?

Thank you, and thank you for your work.
!

[Etheric-Mahes]

Well, any pagination plugin do the job.

Thanks for your support. (it's not ironical, I found out a better way and save time thanks to your silence)