Regarding modelling

[naikodisushil]

how can i modify the columns heights of building which is located on hill slopes?

[z.gronti]

Dear naikodisushil,

If you are using the Building Modeller facility you may define a column height different from the storey height, through the selection of the
Free length radio button and the assignment of different length. Further, the foundation level of the column may be adapted, thus providing the possibility to the user to define different foundation levels.

Finally, if you are not using the Building Modeller you should modify the nodes coordinates to fit the columns' heights.