This is a system setting in Orbit to add or remove user filters in Dashboards. You do need Orbit administrator rights to be able to make this change.
If this setting is turned on a user will be able to add their own user filters from any of the variables accessible to them in the system.
If this setting is turned off then the user will only be able to add predefined filters or user filters from the Dashboard itself.
If you click on the filters button on the top right
it will look like this if it is turned off
and like this when it is turned on.
To turn this option on or off.
Go to Account and Settings on the top right, then Application settings
Then click on the Dashboard Settings tab on the left. Allow Filter By Dimension is what you want turned on or off. I will turn this option on in this example.
When I click on the button to turn it on then I have to click on Save.
After clicking on save this is now turned on.