How to just save a few frames?

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I cannot find information on how to just save a few of these frames of Random Packet Generator.

I.e., you have a bunch of frames you captured from the "random packet generator" module in Wireshark, and you want to save a few of them to a file?

The url will open a picture of what I am asking for.

No, it won't. It's referring to a file on your computer, and none of us have access to files on your computer (which is a good think; you don't want us to have it, as that would let anybody on the internet have access to them, and you REALLY don't want that, trust me).

I could not insert a picture

You will have to upload it to some site and post an http: or https: URL if you want us to be able to see it..