In the General properties’ menu:

• You can check the source entity or Datasource selected for the worksheets
• You can check the relationships between different worksheets and create new ones.
• You can also drag and drop different worksheets, in order to structure your workbook. 

To view general properties:

• Click on the “settings” button highlighted in red.

You will be moved to screen like below:

• Here you can view the source entity/data source selected.
• You can also view the properties from other worksheets. 
• To the right hand side you can view different tabs such as Import&Export, Relationship etc.
• You can easily drag and shift the worksheets between each other to structure your workbook.
• You can also re-name your existing worksheets.

Note : With just a few exceptions, for most of the instances please make sure you have “enable import” activated