Sometimes, you might need to insert a landscape page (or multiple Landscape pages) into a portrait document (to accommodate a bigger table or a large image), and at the same time continue the page numbering.
We will use Section breaks to achieve this. Apply the first section break at the end of the preceding Portrait page where you want to insert the landscape page (or multiple pages).
To insert a section break, on the Ribbon, under the tab Page Layout, within the group Page Setup, click Breaks. From the drop-down list, click Next Page. See below image:
If you are unable to see the Section break, click Ctrl+Shift+8.
Place cursor at the end of the Next page, which you intend to convert into Landscape orientation and insert the Section break.
Place cursor on the same page (between the Section breaks) and then from the Word Ribbon, under the tab Page Layout, within the group Page Setup, click Orientation. From the drop-down menu, select Landscape. The Portrait page converts into a Landscape page.
You can extend the Landscape orientation to any number of pages by placing cursor on the Landscape page and pressing Enter key on the keyboard. See below image: