Currently, Odoo’s built-in Spreadsheet view (in Documents or Dashboards) doesn’t support direct resizing of just the data area within the window. The spreadsheet adjusts to fit the browser window or layout container.

Workarounds you can try:

1. Use Zoom In/Out
   • Use your browser’s zoom controls (Ctrl + or -) to adjust visibility without shrinking the whole window.
2. Fullscreen Toggle
   • Use the Fullscreen button on the spreadsheet toolbar (if available) to maximize view and reduce distractions.
3. Adjust Columns/Rows Inside Spreadsheet
   • You can manually resize columns and rows inside the spreadsheet to make the data area more compact.
4. Embed in Dashboard
   • If used inside a dashboard, try editing the layout to assign less space to the spreadsheet block.

At Wan Buffer Services, we’ve customized spreadsheet layouts for reporting and dashboards. If you're embedding it into a custom view or need fixed dimensions, we can guide you through the template or CSS adjustments.