How to limit revisions?

See https://www.ads-software.com/support/article/editing-wp-config-php/#specify-the-number-of-post-revisions

If you set the limit to, say, 5 then if there are more than 5 revisions for a given post, oldest will be removed, but only when you edit that post. You can use a plugin like wp-optimize to remove more than X revisions globally.

Thank you, Steve,
I had found the possibility to edit the config, but I am not comfortable with that as I am not a developer and usually only use the WordPress surface. If I set that up in config, would the older revisions that exist be deleted? Or would this only have an effect from now on?

Also, I may want different settings for different types like course lessons or pages, or delete old revisions manually when I know I don’t need them anymore.

WP Optimize is one of the plugins that did not delete the old post revisions.
Best,
Nicole

If you set the limit to, say, 5 then if there are more than 5 revisions for a given post, oldest will be removed, but only when you edit that post. You can use a plugin like wp-sweep to remove more than X revisions globally.

There’s no way to set revisions by post content.

Thank you, Steve. I’ll try that.