In the story To Kill a Mockingbird, The law suggets that Atticus should be a bit flexible. How flexible should he be?

I'm not sure where "flexibility" is mentioned concerning
Atticus in To Kill a Mockingbird, but the attorney is forced to
tiptoe around Mayella during her testimony. Atticus knows that he must treat the subject
of Tom's rape delicately while questioning young Mayella, but she immediately has to be
cajoled by the judge to answer Atticus' questions since she believes he is "mockin' "
her. There is no doubt that Atticus would likely have been much tougher on her, but he
recognized that her animosity toward him would have to be lessened. Atticus addressed
her politely, but Mayella took his honest, gentlemanly manner as deliberate sarcasm.
Nevertheless, Atticus "rained questions" upon her, and Scout saw a look on his face that
indicated that his tactics made him sick to his stomach. Likewise, Atticus treated
Mayella's father politely and with the same respect he showed all people, though Atticus
detested Bob Ewell.