When trying to name the file 1.1.jpeg or 2.1.jpeg or 3.1.jpeg etc. PS thinks that the ".1" is an extension.

[yuliyal2431537]

So when I open a Jpeg and the first and the only action that I do is Crop after which I immediately proceed to Save As ----> and later save it as another Jpeg named "2.1" or "3.1" or "5.3" or whatever Photoshop views everything after the "." as an extension so what ends up happening is I end up with an unreadable file name "2" with an extension of ".1" and not "2.1.jpeg" as I intend it to be. Is that a bug? Or am I doing something wrong? (Now what I do is I just save it "blah", and then go back and change the name to 2.1, 3.1, 5.4, 7.6 etc. etc. in the folder. but it's very inconvenient). Please help!

[Test Screen Name]

Things work that way in many apps, perhaps most of them. Windows is designed that way, perhaps Mac OS too. If you type a dot, it means you're taking charge of the whole name, including the file type. So if you want to save something with a dot in the name, type the file type. Not just file.1 but file.1.jpg or whatever you want.

[yuliyal2431537]

Thanks. yeah that makes perfect sense, but I wish there was another way like an option or a box to check. but oh well. thanks again. I guess ill just use dashes or comas then.

[Test Screen Name]

Yeah, this catches me often. I can't tell you how often I've saved a music file (with a running time in the name) called something like "remix 3.15" instead of "remix 3.15.mp3".

[Stephen_A_Marsh]

Not sure of your OS, however many consider it bad practice, however it does not usually create issues on modern OS versions.

Links:

Naming Files, Paths, and Namespaces (Windows)

filesystems - Should file names contain multiple periods? - Super User 

[D Fosse]

In Windows, set Folder Options to show extensions (they're hidden by default). Then I think it should work - otherwise everything after the last dot is treated as a file extension.

But why not use an underscore instead?

[Test Screen Name]

I find that doesn't help (though it makes the problem more evident).