Hi @Alfan_Ngowo ! 
A warm welcome to the community! Whenever you get a chance, feel free to introduce yourself here - we’d love to get to know you. 
Also, I recommend checking out the example shared by @Grzesiek2010 above. It provides great insights into how images (or call them headers / logos / etc.) can be incorporated into forms.
Wishing you a great day ahead! 