I just like looking at logs when i boot my pc 
I have never done this before, so please wait for someone experienced to comment if the procedure is correct.
It should work by editing the file etc/default/grub with a text editor (e.g. nano) as administrator and removing the quiet splash between the quotation marks in the line GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
so that it looks so:
GRUB_CMDLINE_LINUX_DEFAULT=" "
and then updating grub (sudo update-grub).
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You could also press F1 when you get to the glowing Z logo.
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This is correct, however if there are any arguments OTHER than quiet and splash, the user should be careful to leave them in place, rather than having an empty line.
Another per-boot option, if you want to ensure you don't miss anything when the Z comes up, is to hit E at the GRUB menu, remove quiet and nosplash as @Forpli mentioned, and then hit F10. This is the same as editing your /etc/default/grub, but takes effect only for that boot.
To be honest, I prefer the verbose boot as well. There's nothing worse than getting hung on a black screen and not even having a starting point for troubleshooting. Just be aware that if you have any interactive elements in your boot (the only one I'm personally aware of is entering a passphrase for full disk encryption), the cursor may go someplace weird, or it may look broken at that point in the process. Still works fine though.
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i got these so i change the first one to not have quiet splash?
Right. Make the first one also a pair of empty quotation marks, save it, and then run sudo update-grub.
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oh thanks that worked 
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