When you make Graphs destined for big screens in a NOC, the font that's hardcoded in Zabbix (i'm not a big fan of anything hardcoded) is just too small.
This also due to the issue described in ZBX-1121 (you put multiple graphs on one screen, the graphs are small, the legend however is massive)
(with the current version i have to fiddle with the php files)

The font for title, left, right and legend area should be fully adjustable in GUI and per graph.

The fact that 1.9.x has an optional legend is already an major improvement but this should be looked into further.