How to Add Photos To iTunes for Syncing To iPhone 12
Apple iTunes is not only a music player on computer, but also a tool that you can use to sync data to your iPhone iPad or iPod from PC/Mac. However, its sync feature seems not easy to use especially for new iTunes users. So in this post, for users who want to add photos to iTunes for syncing to new iPhone 12, iPhone 12 Pro, iPhone 12 Mini, we give some tips.
How to Add Photos To iTunes for Syncing To iPhone iPad

Step 1. Connect your iPhone to computer using data cable and run iTunes.
Step 2. Click Device icon > Select "Photos" under "Settings" > Check "Sync Photos" > Select where you want to add photos from > Choose whether to move all folders/albums or only the selected ones to your device > Click "Apply".