The phrase "slightly modify" is a perfectly correct and usable phrase in written English.
It can be used to indicate that something is changed, but not completely transformed or replaced. For example, "We decided to slightly modify the design of the website to make it more user-friendly."
Users can also slightly modify the appearance of their profile.
At N.Y.U., Troemel began to slightly modify his anti-art-object stance.
However, in some areas fractionation processes occurring during and after rainfall slightly modify the isotopic composition of the groundwater.
They slightly modify the angle of attack of their wings and describe spirals that grow further and further away from the established surface of the globe.
A heuristic is intended to evaluate and slightly modify a solution that violates a constraint in a way that avoids or mitigates such violation.
In addition, it has turned out to be possible to slightly modify plastic potentials which do not satisfy the criterion, in order to achieve convexity.
To slightly modify my favorite (from @crazynairobian): most runners want to run like the wind, but the wind wants to run like Rudisha. Malcolm Gladwell writes about Alberto Salazar, Mo Farah's coach.
Dry-ice blasting combined with substrate preheating slightly modify the morphology of Mo splat sprayed on aluminum and stainless steel surfaces.
To obtain semi-classical solutions to the Schrödinger equation with different initial wave functions, we only need to slightly modify the summation formula.
And what would happen if I slightly modify the expression of a thousand genes -- does that make a human being?" After all, Dr. Reynolds says, "our genes are almost identical to chimpanzees.
He said that Merck had largely resisted a strategy embraced by other companies in which they slightly modify a rival company's breakthrough treatment and then market this so-called me-too drug.
