# Main Window > Most menu actions referred in the following have keyboard shortcuts, and many are available from the toolbar. The keyboard shortcuts are found in the pull-down menus. This is the main window from where you work with your databases. Below the menubar and the toolbar is a tabbed pane containing a panel for each of your currently open databases. When you select one of these panels, a table appears, listing all the database's entries, as well as a configurable selection of their fields. * You decide which fields are shown in the table by checking the fields you want to see in the **Preferences → Entry table** dialog. * Double-click a line of the table to edit the entry content. You can navigate the table with the arrow keys. * **Preferences → Entry table**, but to more quickly change the order, click the header of a column to set it as the primary sort criterion, or reverse the sorting if it is already set. Another click will deselect the column as sorting criterion. Hold down Ctrl and click a column to add, reverse or remove it as a sub-criterion after the primary column. You can add an arbitrary number of sub-criteria, but only three levels will be stored for the next time you start JabRef. * Adjust the width of each column by dragging the borders between their headers. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.jabref.org/v5/advanced/main-window.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.