@chase.freeman I believe she means the training app which you can download from Github in dhis2/dhis2-android-capture-app releases page: Android Capture App for DHIS 2 (v2.5.1) - Training app apk
The production app doesn’t allow taking screenshots and there is no setting to allow that. Sorry I thought only the training app allows taking screenshots! 
Please see Jaime’s post below!
Hope I answered your question! Thanks!