Do not manually create or manipulate Bitcoin transactions unless you absolutely know what you are doing (and think twice even then).
You don't want to end up as the guy spending 10 BTC in mining fees on a zero BTC transaction...
Mining fees are not stated on transactions.
There's the input data and the output data that is necessary and only the output says the specific amount afaik.
P.s it was 15btc
If you import a transaction it goes into the preview window, you should be running transactions that way instead to make it more secure and know exactly what you're doing a bit better.
To be more precise, the transaction fee is implicitly stated -- it's the difference between the sum of all inputs and the sum of all outputs

Still easy to mess up though
Good point about using Electrum's preview window!
I believe the antpool "acceleration" submitter still works even for 0-fee tx now, so in the unlikely event someone inadvertently managed to make such a tx, there's still that one avenue for confirmation.
Is Antpool's accelerator free though? The only free transaction accelerator I'm aware of that actually is working is the one from ViaBTC and that one requires a minimum transaction fee.