Insert Landscape pages in paper

We are often faced with a long table in the middle of the document. I used to insert a text box, then ratate it so that final view had a rotated table. However, when I went on to edit the table/text box content, it would rotate back... and things are not so easy!

This solution is easier than what I used to do:
Simply highlight the text/table to be rotated into the landscape, then go to margin, select custom, then do landscape page orientation for the selection. Voila! I am assuming that the table will occupy the whole page.

The following is from Office Support page:
https://support.office.com/en-us/article/Rotate-page-orientation-between-portrait-and-landscape-in-Word-2010-14952283-8BA7-4A52-82B9-A8487A5674B4

Use portrait and landscape orientation in the same document

1. Select the pages or paragraphs that you want to change to portrait or landscape orientation.
   NOTE    If you select some but not all of the text on a page to change to portrait or landscape orientation, Word places the selected text on its own page, and the surrounding text on separate pages.
2. On the Page Layout tab, in the Page Setup group, click Margins.
   
3. Click Custom Margins.
4. On the Margins tab, click Portrait or Landscape.
5. In the Apply to list, click Selected text..