I had recently gifted my Mom a Nexus 7, with a hope that she will like to read books. She is old with poor eye sight and can't read English that great. I find her eager to learn and she had made a good progress in reading few books. Since she is not used to these gadgets, I am trying to keep settings in her tablet constant. Recently I observed that the shortcut in home screen for PDF reader disappeared and resulting in discontinued reading till my arrival. The frequency of this sort of interruption has increased now a days. Rather than finding how the shortcut is being deleted, I think preventing changes to home screen is sensible.
Hence, I would like to know about any means to keep the icons or shortcuts in home screen and in launcher constant, immune to long press and drag and drop operations.
Device info: Nexus 7, running stock 4.2.1, unrooted, but willing to root if required.