Personalize the plot of historical decomposition

Hallo everyone

Dynare reports the plot of historical decompostion, but now I would personalize it

Do to that I would export data from oo_.shock_decomposition into excel file with a Matlab command such as xlswrite. However, it does help since the matrix oo_.shock_decomposition is 3-dimension one. As an example, in my case oo_.shock_decomposition** is [15x6x69 double]. How to interpret it? what the meaning of 15 and 6 and 69?

In my case, I have four structural shocks, and number of obs is 80, and I would do historical decompostion for 4 obs. variables

Thank you so much in advance

Please see Shock decomposition graphs