how to save customized ink styles on ipad app

Hi all,

I’m reading a paper using ipad app, and use ink to highlight or add some notes. 

Whenever I use the ‘ink’, I have to adjust thickness- I have to adjust to 0.5 when I write letters and adjust to 2.0 again to highlight- this feels inconvenient. Does anyone know how to save a specific style that I frequently use?