The phrase "alter only the" is correct and usable in written English.
It can be used when specifying that changes should be made exclusively to a particular aspect or element of something.
Example: "Please alter only the sections that require updates, leaving the rest of the document intact."
Alternatives: "modify just the" or "change solely the".
In the end, she decided to alter only the features over which she experienced dysphoria, and to forgo interventions that were simply for the sake of aesthetics.
The latter proves useful for making high-frequency changes that alter only the target amino acid sequence and even allows modification of essential genes.
However, the development of treatments that alter only the tissues affected by a particular disease – for example blood cells – is allowed, and clinical trials may start within a couple of years.
The Daniels liked the restrained structure of the interactivity: instead of forking narratives, the story — in this case, the song — remained fixed; viewers were able to alter only the context of what they heard.
The latter tend to accept as fixed the character of the individual whose good is being judged, and alter only the individual's cognitive capacities and beliefs so as to read off the good for the individual from what his cognitively enhanced self wants.
Maternal smoking appeared to alter only the skeletal size component (Fig 3b), suggesting the intra-uterine environment does play a role in determining skeletal size.
The Taylors drove the same route they did in 2009, altering only the locations of the start and finish.
Such crosslinking or branching appears to be minimal, altering only the creep lifetimes and leaving the other tensile properties largely unaffected.
As summarized in Table 1, NTG significantly altered only the behavioral endpoint of locomotor activity.
Therefore, our objective is now to hide the traces of the manipulation by altering only the source and destination patches.
The spatial pattern of the predicted horizontal deformation did not change significantly as the viscosity was altered; only the magnitude of the deformation changed.
