Simplify Summary Text for notifications

Allow users to simplify summary text when there're pending notification to review.

Current Design:

Here’s your summary

show

Maybe, better:

Here’s your summary

Notification Summary

Show summary

Or, just:

Show

Or, something else but simple

We don't need multiline text because I would like to look at summary whenever I have time but I don't want it to mess up the look. Or, may be, allow user to customize between all this options.