I don't mark my ball with an alignment aid. I use ProV1's with an enhanced alignment logo which can be added when ordering the balls through Titleist.com.

Can't do it as I line putt, I look at the hole then draw a eye line back to the ball & putt. I tried it on a practice green & didn't know or couldn't figure out exactly how to sit the line(s) to match my line I wanted to hit & the line on my putter so I missed putts I would normally make. I like siting my ball down removing my mark & lining up my ball path & putting.

DM

I use a multicolored line with some dots on the logo to help identify my ball.

No alignment aid for me. My putter head has enough aid for me.

I just use the “Pro V” logo on the side, don’t need anything bigger or thicker than that

I go back and forth between drawing a line and using the Pro V logo for alignment. I’d be curious, if when addressing your putt, if the line looks “off”, do you stop, remark and realign? Or do you just adjust, roll it and hole it?

Tried some of the ProV1 alignment balls. Didn’t seem any better than just using the arrows, but no worse either.

I like to see nothing on the ball when putting, and I don't really mind off the tee.

I prefer to see nothing but white so it doesn't become a distraction. That said, I try to generally align it from underneath with how I orient the ball in my hand before teeing on putting.

That said, my mark on the ball is a green underline between Titleist and the number, acting in my mind as the two aims I have on the course: steady, straight line approach, and getting on the green being the most important thing.

I only use the Titleist name as the aid no drawn line. It’s the symmetry.

Both off the Tee and on putting green.
Off the tee helps alignment as once ball lined up I only have to square driver/iron head up with the line, don’t have to and look longer toward the flag which will have more scope for deviance.m in range of error.
On the green is more for settling, taking time and concentrating as much as lining up.

Hate lines on the ball and when adressing or lining it up for the putt wanna see it all white! In addition mark them very boring with three dots around the ball‘s number.

I use a line to putt and to tee off. I really like it and gives me a ton of confidence on the green. Putting is getting better and better!