How to create a Rehearsal Mark that starts w1th a different letter other than A or 1

I need to start this score (existing orchestral part I am transposing) to the Letter K instead of an A or a 1

In Properties set your rehearsal mark to 11 (=K) instead of 1.

Thank you. 11 is the number in the Alphabet. Brilliant!!!

Welcome to the forum @Anthony_Tony_Masiell – in case it’s helpful as you settle into Dorico, here’s the relevant page for this in the manual: