This issue may be related to Syslinux 6.02, which has been identified and fix in the latest ISO. See https://bbs.archlinux.org/viewtopic.php?id=173665 and https://bbs.archlinux.org/viewtopic.php?id=172588 for further information.
I'm not sure if editing, adding boxes etc. is integral pat of taking a screenshot. How about using e.g. gimp for that?https://wiki.archlinux.org/index.php/Ta … screenshot (yes, some of them are pretty heavy)See also https://aur.archlinux.org/packages/maim/ and generally search around.
The ArchLinux Wiki has the best documentation available and with the problems you describe here, if it does not suffice, ArchLinux is likely not for you.Everyone can install ArchLinux and most can use it, but it does require more from the user than Ubuntu and such.https://wiki.archlinux.org/index.php/The_Arch_Wayhttps://wiki.archlinux.org/index.php/Beginners%27_Guide