However, you can use the comparative and superlative forms of the adjective "legible" to describe the clarity of writing:
* Comparative: More legible
* Superlative: Most legible
For example:
* "The first draft was legible, but the second draft was even more legible." (using the comparative form)
* "Of all the students, hers was the most legible handwriting." (using the superlative form)