Open PDF dialog, select the PDF that has the content you seek to combine. · In the secondary Open PDF dialog, click the Open toolbar button. · Choose the file you wish to merge into a single document (it can be in the current document or in an alternate location). How to convert PDF to a digital image or computer-readable file If a PDF is a digital image, copy/convert the PDF by using the following methods: PDF conversion is a process to convert a collection of images of pages into a single image. How to convert files or images to PDF in Windows 1. Click on Start Menu > Control Panel (Control Panel) 2. Select Folder Options in the Windows Control Panel and then click on the Advanced tab. Click the Encrypt and Store box if you wish to hide the files. Click on Allow file encryption if you have not already. 3. Click on the Advanced tab and click on the Change button. 4. Expand the Security Setting heading located next to the Show hidden files and folders check box.