On Tuesday, April 14, 2015 at 10:58:16 PM UTC+2, martin....@gmx.net wrote:
>
>  I don't mind additional arguments with a higher level of abstraction. But 
> if you want "show" as a preview to "save" (as in methods 3 and 4), then 
> "show" should support all the options "save" does. 
>

Typically your UI doesn't have viewers for all kinds of files that you 
might be able to produce, so it just can't. It might not even make sense, 
e.g. save() can also save python pickles. Why should show() have a switch 
to distinguish between gif87a and gif89a? They look the same. If for some 
reason only one of them can be shown by the UI then the right one should be 
picked automatically.

If you want to micromanage the output down to a level that makes no visual 
difference then IMHO you should just save the particular file that you 
want. With #17942 you could then even immediately display the file 
(assuming that the UI can) using graphics.save('filename.png').show()


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