[Cin] add Frame on PiP on manual

[Phyllis Smith]

Thanks to IgorB for how-to, Andrea for Latex formatting, and Andrew for
proofreading.  Made a few corrections based on feedback and checked into
GIT.  (Andrea, note I have added a new section to Manual, Authors and
Contributors, so you may want to checkout all from GIT because
CinelerraGG_Manual.tex changed and it would be very helpful if you have
time to verify that I did not forget something).

On Sat, Jan 14, 2023 at 3:17 AM Andrea paz via Cin <
cin at lists.cinelerra-gg.org> wrote:

> I have added a new section to the Real-World appendix of the manual.
> It consists of adding a frame to a Picture in Picture and is based on
> a post in our forum. I enclose the latex file with image and also the
> text in odt for those who would like to review it. See if it is OK for
> you.
> Link to the files:
> https://ufile.io/zfshf1ct
> --
> Cin mailing list
> Cin at lists.cinelerra-gg.org
> https://lists.cinelerra-gg.org/mailman/listinfo/cin
>
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