How do I change "ignored" sentences to "100% mastered?"

To change “ignored” sentences to 100% mastered, you should go to the manage mode for the collection in question. To do so, click the three horizontal dots (Options) for the collection where the sentence in question is.

Once inside the search box, select “Ignored.” Check the box next to the sentence (s) you would like to change to “100% mastered.” Then, select the icon labeled “Master” with a check sign.