To flip landscape orientation when printing in Excel, follow these steps:

1. Open the worksheet that you want to print.
2. Click File, and then click Print. The Print dialog box appears.
3. Click Properties. The Properties dialog box for your selected printer appears.
4. On the General tab, click the option that you want under Orientation. For example, click Landscape. If you want to preview your changes before you print the worksheet, click Preview. Otherwise, click OK, and then click OK again.

Rotate or flip a picture (Office Support)