From 2.7 b193 you will be able to copy/paste the following settings within the same file, or between files.

Within the same file

• Aggregation settings
  
  You can copy/paste aggregation settings of a particular view by clicking the Aggregation dropdown of a particular view and then choose “Tools” button above the preview table.
  
  
• Tab settings
  
  You can copy/paste a tab in several ways from the Tabs menu in the main toolbar or by right-clicking the tab.
  
  The tab settings once copied can be applied in 2 different ways:
  
  
  • Replace the entire tab with another tab’s settings. This can be achieved by selecting paste
    in the appropriate tab or by right-clicking on a different tab and choosing paste.
    
    Note: You don’t need the tab to be active in order to apply the setting. You can simply paste the settings by right-clicking the target tab.
    
    
  • Paste the tab as new tab by choosing “Paste from clipboard” which is right next to other create tabs options (Plus ‘+’ button in the tab bar or from Tab > New).
    
    
  
  
• View settings
  
  You can copy/paste view settings from “Tools” menu from the View’s toolbar. Copying view settings will copy aggregation as well as data subset settings among others.
  
  If you try to paste a settings from different view type you will be prompted to allow you to confirm switching the view type. You can also add the copied view as a new view from the “Add view” button.
  

Between files

You can apply all the above settings between files by copying settings from one file and then choosing paste option in the other file.

You can also import tab settings from another file by choosing “Import tabs from another file…” which is located in the same place “Paste from clipboard”. Choosing this option will prompt you to choose a file and allow you to pick which tab settings to import.

If the settings are not compatible, for example, if you are copy/pasting across files and some of the fields do not exist then settings which refer to invalid field will be ignored and not applied while other settings will be applied.