Digital Picture Frame includes two PIN-based protection features to help prevent unauthorized access: “Lock Source” and “Lock App”.
“Lock Source” protects an individual source. Open the source, select “Set Up Lock PIN”, and choose a PIN. When the source is locked, you must unlock it before browsing its contents, changing settings, or linking folders/albums. Once you are done, you can lock it again with “Lock Source”, and the app can also lock it automatically again after exit or restart.
“Lock App” protects the entire app on the current device. Open the app settings, set up a 4- to 6-digit PIN, and you will be prompted for it when the app starts on that device. You can later change or remove the PIN from “Lock Options”.