Some picture frames have these little backings that you need to open. Using your fingers to open the backing can hurt after awhile, so this is what worked for me.
Using any plastic card (preferably one that is expired or one you don't need because it'll scratch).
Slide the card underneath the backing and lift up. Same applies to closing the backing. Put card on top and press down.
Source: Personal experience
What a brilliant idea! I always break nails when doing this so will definitely be trying this tip
My nails ends up hurting so this helped significantly! Hope it works out for you too!
Super idea!
Marg from England.