I found that in Zabbix 1.1.1 that when you type in a time to display that it doesn't go to that time. This is true for just clicking on a graph in the latest data tab as well as for any custom screens that use simple graphs. However if you build a custom graph the feture works perfectly.
I have been working around it by just simple creating a graph even for single items if I need to display certian time periods for that item.
I have been working around it by just simple creating a graph even for single items if I need to display certian time periods for that item.