In decorating cookies, how do you put tiny sprinkles in a line on the frosting? Use a toothpick? Help.?

Tweezers and a lot of cuss words.

I've seen chef's use templates for decorating cakes and cookies.

you put the sprinkles in a baggie with a very small hole in the corner of it so you then have a controlled sprinkle and can place it where ever you want.

They do have tiny tweezers for baking. I just use my hands.

You could use bigger ones, like the silver balls [dragees], their easier to handle and put in position.

How about putting some sprinkles in a V-Shaped piece of piece (aka a once folded down paper) , they will go into the crease of the paper, ant then slowly tip and pour the sprinkles out on to the cake. In the row that you want. That is just a guess of what might work for you.

put icing on cookie...throw sprinkles on top...done...the rest of the sprinkles fall off

I'd probably pipe a line of frosting on the bare cookie, sprinkle it, save the sprinkles that don't fall on icing for the next cookie and if I want more icing I'd do it after the sprinkles and with a piping bag.

Use a tweezer