Is there a way to change a dashboard's default time frame?
This is configurable on the http://PCHOST:8181/pc/center/admin/debug/attrs page. On that page there is a System.DefaultTimeRange which defaults to 0 (Last Hour). Simply change the number and hit the Update button.
Here are the allowable values:
Now log out of CAPC and back in again, and your dashboards will have a default time that corresponds to the value you set for the System.DefaultTimeRange attribute