For enhance the cell height, Presentation tab, you can able to do by selecting the wrap cell text and cell height..
increase the length of the cell, when you move move the mouse, in between two column, exactly the line which split the two column, you can see the symbol like '+', from that, you can increase the length of it
you want to keep equal column width, right click in the chart , you can choose the Fit columns to data/Equals column width
It's quite that but not exacly. Imagine you have a drill-down group with 3 levels (X->Y->Z). However, not all the values X has values in Y and not all values X that has Y has Z, i.e., there are some values that can be drilled-down and other that cannot. So, I want to enhance only the cells in X that can be drilled-down to Y and then also enhance the cells in Y that can be drilled down in Z. How can I do this?