In order to install Linux from a bootable USB stick I need to be able to get to the Boot Selection menu, but on Acer systems with UEFI firmware, this is a bit tricky. The Boot Menu key (F12) is disabled by default, so I first have to boot to the BIOS Setup Utility, by pressing F2 during the power on or reboot cycle. Then in the Main setup screen there is an option to enable "F12 Boot Menu".
That's one trick down, but there's another one which might be required. Depending on what version of Linux you want to install, and perhaps how you feel about Secure Boot, you might want/need to disable that. In the BIOS Setup Utility, on the Boot menu there is an option to disable Secure Boot - but I can't get to it: moving the cursor down just skips over it!
I can change boot mode from UEFI to 'Legacy BIOS', but that isn't what I want to do. I learned (the hard way) with my previous Acer Aspire One, that I have to go to the Security menu and set a "Supervisor Password" before it will let me disable Secure Boot mode. I'm sure this makes sense to someone, but whoever that is, it isn't me.
In this case I am going to start by installing Linux with Secure Boot still enabled, so I don't really have to do this, but I went ahead and set a supervisor password anyway, because I will eventually want to turn off Secure Boot anyway.