how to create one pdf from multiple pdfs

To manipulate pages in a PDF, make sure that you have permissions to edit the PDF

For example, if the first page in the document is numbered i, you can enter (1) in the Enter Page Range drop-down list, and the page is deletedHow to delete pages, using page thumbnails Steps: Choose Tools > Organize Pages or choose Organize Pages from the right pane

The Organize Pages toolset is displayed in the secondary toolbar, and the page thumbnails are displayed in the Document areaSelect a page thumbnail you want to delete and click the icon to delete the pageAlternatively, click the Page Thumbnails button in the left navigation pane to open the Page Thumbnail panel, then select the page or group of pages you want to delete

Click Delete Pages at the top of the Page Thumbnails panelHow to replace the contents of a page in a PDF Steps: Open the PDF that contains the pages you want to replace

Choose Tools > Organize Pages or choose Organize Pages from the right pane

The Organize Pages toolset is displayed in the secondary toolbarSelect Advanced Settings near the top right of the program

In the PDF tab, put a check next to Open Password, and then enter a password in the field to the rightYou can optionally choose Permission Password, too, to set up a PDF owner password to restrict editing, copying, and printing from the PDF

Choose Ok to save the PDF security optionsSelect Output Folder toward the bottom of the program and then pick where the password protected PDF should be saved