How to write in "additional flags" ?

[alpaa9]

I'm trying to insert in "additional flags" profile, level and tune like in ffmpeg:
(-profile:v high -level 4.1 -tune:v film).
You gave this example: --bframes '8' rc-lookahead '40' no-rect
(Note: Numbers should be in single quotes.)
I wrote like this: level'4'.'1' ref '4' deblock -'1',-'1'
but the commands are not executed.
Could you tell me the correct way to write?
Thank You