Sometimes I am so lazy to make underlines by using Line Tool
And the underline on text function on Photoshop is a bit blurry
When I zoomed :
There is 2 pixels (like 1 pixel semi-transparent extra)
Any trick or setting can I fix this ?
Edit > Free Transform tool. Zoom in (more than 200%) and use the up/down arrow keys to nudge the text by sub-pixel values until the underline go crisp. That's the only workaround I know.