In my document have on combo chart, one dimension two expression .Expression are Cyclic Group method
Cyclic -1 Expression
Ex: X-Sum
Y-Sum
Z-Sum
Cyclic -2 Expression
Ex: X-Sum
Y-Sum
Z-Sum
Now user are select Z-Sum in Cyclic -1 Expression and Y-Sum in Cyclic -2 Expression .bookmark then saved. now select my book mark time expression list are changed Y-Sum in Cyclic -1 Expression ,and Y-Sum in Cyclic -2 Expression .