I frequently symbolize layers by unique values (e.g. first rock type encountered in an exploration drillhole). This typically results in a layer with 15+ unique rock type all symbolized by the same size of simple/circular marker that is colored differently based on the rock type. The resulting maps that I print are used for interpretation by hand and a common revision that I have to implement is the re-sizing of these layer files.
Is there a method or script that I can use to change the size of all of these symbols in one step instead of manually modifying the size of each rock type's symbol?