The pictures should be exquisite and captioned.
Generally speaking, 10-20 minutes for graduation defense, PPT pages should not exceed 30 pages.
You are a design major, maybe you should focus on the introduction of your works.
It is best not to write an introduction presentation. You'd better not write too much PPT, or your presentation will become reading aloud.
However, you should also guard against accidents: if your defense sequence falls behind, you should be prepared to be occupied by the classmates in front, and you may not have time to elaborate on what you have planned to say, so you'd better prepare a version of the core introduction and psychological preparation for emergencies.
Of course, if you have less time to reply, the teacher may ask fewer questions, Sai Weng ~ ~
Other details can be searched again. Just finished the defense, and it is also a PPT from scratch. Amen ~
good luck