Narrow columns or low-res devices, left justified. Hi-res or wider columns, where full-justified works better, full justified.
The Nook STG is in the middle for me. Depending on the lighting, I vary the font size, and depending on that, full works pretty well or it doesn't.
To be specific, I counted. <50 characters per line is clearly better left justified, and >60 characters per line, I prefer full justified.
|