OPEN THE IMAGE YOU WANT TO CONVERT:

Double click on the image you want to convert and the image will be in preview. If you want to add more images to this file to convert it to pdf, then click on the View menu that would be at the top of the screen. Then select Thumbnails, drag any more photos that you want to add to the sidebar, and these images will be converted as well.

GO TO FILE MENU AND CLICK EXPORT:

The file Menu would be in the upper-left corner of the screen. Click on this menu and then select export. This is for exporting the document or pdf format.

FROM THE MENU CHOOSE PDF AND SAVE:

Select the option "pdf" from the format menu. Here you have another option as well, and that is to encrypt your file by adding a password if you wish. This is an optional feature that is not mandatory and can be skipped. You’re at the final stage now. Name your document as you may and click on the save button. This will save your image as a pdf, and you’re done with the process.

Here are the steps on how you convert image to pdf on a Windows;

OPEN THE PHOTOS APP:

On your computer, open the photos app. This is the photos app that you’ll be using to convert your image to PDF format.

SELECT THE PICTURE TO CONVERT:

Double click on the picture you want to convert, and it will be shown in preview. If you want to add more pictures, click the "Select" option. This would be on the upper-right side of the Photos window. Then click individually on each photo that you want to add to the PDF and they will all be selected.

SELECT THE PRINTER ICON:

Click on the printer icon that would be in the upper-right corner of the window, or for your convenience, you can press Ctrl + P as well to directly bring up the print menu.

SELECT "MICROSOFT PRINT TO PDF":

Choose this option to convert your image. If this option is already selected, then let it be as it is and make no changes. Making any changes may lead to problems in converting your image.

GIVE THE FILE A NAME AND SAVE:

Write the name of your pdf document as you may. Then choose a folder and select the save button to save this pdf file. These are the two procedures for converting a file from an image to a pdf on both Windows and Mac. I hope this helps.