Description of problem: non-accurate statements at https://docs.fedoraproject.org/en-US/fedora/f28/install-guide/install/Installing_Using_Anaconda/#sect-installation-screenshots is is stated:

'press Shift+Print Screen at any time during the graphical installation to capture the current screen. These screenshots are saved to /tmp/anaconda-screenshots.'

Actual results: combination 'shift + Print Screen' does not operate on physical hardware, 'Fn + Print Screen' does, and only from the moment either Anaconda boot options 'Start Fedora-Workstation-Live [version-number]', 'Test this media & start Fedora-Workstation-Live [version-number]' is selected and installer has reached a phase in which a graphical environment is displayed

File /tmp/anaconda-screenshots is non-existent in the Liveuser's resources tree. Screenshots are found from /home/Liveuser/Pictures.