Is there a Snap-to feature to better align the photos?

Yes, there is. Here are the steps to enable it:

  1. Open your project and click Grid at the bottom of the window.

    Enable Grid

  2. This feature will create the lines that will help you align photos, calendar grids or other things like shapes or clipart. Every object will be automatically snapped to the grid when moving. You can adjust the grid size to your needs using the slider:

    Adjust Grid size