I'm not a teacher.
SketchBook Mobile Android app helps you get the picture
the picture = the way things are or were; the facts about something; the situation; what happened or happens.
get the picture - get the meaning of something; "Do you comprehend the meaning of this letter?"
get the picture (informal)
to understand a situation 'He doesn't want her but he doesn't want anyone else to have her, you know?' 'I get the picture.'
After the fight on the playground, the principal talked to the boys who were watching, until he got the whole picture.
Student or Learner