1. Start a new Blrt.  
2. When the 'Add pages to Blrt' screen appears tap the add page button (a page with a '+' in the middle). 
3. When the 'Add media' screen appears select to add an image. 
4. Tap the 'Photo gallery' icon on the 'image' screen and select the photos/images you want to add.  
5. Once you've selected the photos you want Tap the 'Done' button in the upper right corner.  

*Note: If you wish to add images from multiple albums in your devices photo gallery once you have selected and added media from one you will have to Tap the circled '+' to select photos from a different album.