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wget https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
wget http://rpms.remirepo.net/enterprise/remi-release-7.rpm
rpm -Uvh remi-release-7.rpm epel-release-latest-7.noarch.rpm
subscription-manager repos --enable=rhel-7-server-optional-rpms

You need to use the following key combination to scroll up and look at your data under GNU screen. First press:
CTRL-A

Next press:
[

This will activate copy mode in GNU/screen. Now, you can scroll up/down and look at your data. Use the following keys:

CTRL-u and CTRL-d scroll the display up/down by the specified amount of lines while preserving the cursor position. (Default: half screen-full).
CTRL-b and C-f scroll the display up/down a full screen.