manual teaser brakes are ignored with “excerpt-only”

I also am looking for a way to have the plugin limit the length of the “inserted” page by using some sort of “Read more…” function that links to the actual page.

Any ideas how to get this done with Insert Pages?

I think you’re on the right track with using the <!--more--> quicktag. We’ll look into why that’s not working in the plugin, then you should be able to use the excerpt display.

Version 3.4.6 was just released with this fix:
https://github.com/uhm-coe/insert-pages/commit/4a36f506466d426301e083d9a255c4aac1fa623e

You should be able to use the excerpt and excerpt-only displays, and they will respect any <!--more--> quicktags in your content. If they don’t exist, it will fall back to the specified excerpt length (defaults to 55 words; customizable with excerpt_length filter).

Note: if you want to customize the “Read more…” link after excerpts, use the excerpt_more filter:
https://developer.www.ads-software.com/reference/hooks/excerpt_more/
Note that WordPress will not print this if you use the <!--more--> quicktag.

super, thank you!
will test it right away.

Yes, I also confirm that it is working now.
Thank you!!