Use the end of the jointer which you have identified as the correct radius for the mortar gap.
Step 2 – Hold midsection
Hold the midsection of the jointer between the thumb and forefinger.
Step 3 – Align jointer
Align the jointer so it is ready to compress the mortar in-between the bricks. The sides of a beaded jointer will create grooves resulting in a centrally raised square or round bead finish.
Step 4 – Carry out jointing
Carry out a smooth jointing motion, working in the same direction throughout. Tool vertical joints followed by horizontal joints.
Finished beaded mortar joints look like this. This design is primarily used for restoration and stone work.