Instruction for Job application flow block and editing lookup value .

Summary:

1) I am trying to add Instruction for a blocks in job application flow However I am not able to put Whole Instruction in the section Is there a way to increase its length or it has some word limitation ? Please refer image1

2) I am trying to edit the look up vale under Per_ethnicity But it does'nt fit . Please refer image2

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image1

image2