Hello there!
The Assets tab, which will provide you with an overview of all your assets, can indeed not be customized. You can only filter the results by using the filter boxes on top and export the results to Excel if required by using the export options on the left-hand side of the overview.
Alternatively, you can use the built-in report "Assets: All columns from the Assets menu" which you can find under the Reports tab, this report you can customize to display only the columns that you want.
If you no longer have this report, you can find all our built-in reports and more on our forum: https://community.lansweeper.com/t5/general-discussions/assets-all-columns-from-the-assets-menu-buil...