"help to design" is a correct and usable phrase, and can be used in written English.
For example, "I will help to design a new website for the business."
In general, design changes are indispensable and designers need help to design them properly.
AR can also help to design production lines.
This may help to design the new optic nanomaterials.
This is of help to design RC columns reasonably.
Also, these polymers can help to design the ideal RAMs.
They told the BBC that the concept would "help to design a joint prosthesis".
Rosen and his team hope their studies will eventually help to design optimal clinical trials.
Consumers can drive producers to make changes and help to design solutions.
This structure-property relationship will help to design new electrolytes for Mg battery.
This relationship is so close that companies help to design the curriculum, give technical support and help with expensive equipment.
Selling off parts of businesses and laying off thousands of workers do not help to design a better car.
