1. In the Bookmarks panel, select a bookmark, or Shift-click or Ctrl-click to select multiple bookmarks.
2. Right-click the selected bookmark(s) and choose Delete Section(s) to delete the bookmark(s) (including the child bookmarks if any) and the pages associated with the bookmark(s).

1. In the Pages panel, select a page or group of pages: 

• Drag the mouse to select the page thumbnails.
• Shift-click or Ctrl-click to select a range of page thumbnails.

2. Press Delete to delete the selected pages. Or right-click the selected pages, choose “Delete Pages…” in the context menu and click OK.

1. Open the PDF document where you want to delete pages.
2. Choose Organize > Delete.

3. Specify a page range by entering the page number(s) you want to delete. You can choose All pages in range, Even pages only, Odd pages only, Landscape pages, Portrait pages, or Blank pages to delete the related pages in the specified range. 

The Swap feature is useful sometimes if you want to swap two different pages within a PDF document. 

The Move Pages feature allows you to move pages within a PDF document.

Move one or more pages within a PDF document

You can rotate all or selected pages in a document.

1. Open the PDF file (i.e. source file) from which you want to choose a range of pages (i.e. source pages) to be inserted into other files. Click Home/Organize > Insert > Into File, or right-click a page thumbnail and choose Insert Pages… > Into File. 
2. In the pop-up Open dialog box, choose the file (i.e. target file) to which you want to insert the source pages and click Open.

1. Open the PDF that you want to use as the basis of the combined file, and choose Home/Organize > Insert > Blank Page, or right-click a page thumbnail and choose Insert Pages… > Blank Page.

2. In the Insert Blank Pages dialog box, specify where in the document you want to insert the blank pages (as well as how many blank pages you want to insert), and click OK.

1. Open a PDF file, and choose Home/Organize > Insert > From Web Page, or right-click one page thumbnail and choose Insert Pages… > From Web Page…. 

2. In the pop-up dialog box, input the URL of the destination web page you want to insert, or click Browse to choose a file. Click OK to convert the web page and insert it to the PDF.

1. Open a PDF file, and choose Home/Organize > Insert > From Clipboard, or right-click one page thumbnail and choose Insert Pages… > From Clipboard. 

2. In the pop-up From Clipboard dialog box, specify the place you want to insert pages. Then the content in the clipboard will be inserted.