To put someone in the picture means to keep someone informed or updated so that they have awareness or information about the status of a project or how something is unfolding. You can also stay to keep someone in the picture. Similar in meaning to keep me in the loop.

1. Claire was happy to put Chris in the picture about everything that had happened with the project since their last meeting. She was hoping that he would be impressed by the significant progress she had made. 
2. I was annoyed at being kept out of the loop about the sale, but my boss promised to put me in the picture as soon as a final decision was made.

1. Keep me in the picture with your plans for buying a new house. I know someone who might be able to help you.
2. My family are terrible at keeping me in the picture about what's going on in their lives.