the data preview in eclipse is a very powerful tool to display table content in ABAP in Eclipse.
But I often hear the problem that it is quite cumbersome to open the data preview via the project explorer.
Because you first have to open the correct package in the project explorer to right-click there to open the data preview.
Do you know that there is a quick launch possibility via ALT-F8?
Just open the dialog 'Run ABAP Application' (ALT-F8) and enter the name of the table you want to inspect:
There is the usual search behavior with type restrictions possible in the dialog field.
When you choose an item from the result list the data preview is opened.