Still having trouble doing “save as”... thank u!
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After you've first named a file, the next time you save the file, it will just continue to save a version of that file as the exact same name as before. However, if you want to create a new version of the file and name it differently, then you may find that "save as" is not apparently available. To reveal that option, in most programs you can go under the File menu in the menu bar and hold down the Option key. That should give you the option to "Save as".