Parametric design?

[Anonymous]

Hi, 

I have been struggling with this one thing. I am trying to do parametric designing and using user parameters. 

I created a box with user parameters for width and height.

I extruded this

I then made a new sketch on top of this box and made 4 slots.

I extruded these to a cut.

This is all fine

However, now if I want to change my width and height of my new box, the slots I made do not change with the new size. See below the two pictures. 

How do I change the parameters and keep others thing like the slots in relationship to the new size change.

I want to be able to change the size of the with and height and everything else changes with it. Is this possible? 

Thank you and I have been watching many videos and if there is a video or article that can directed me in this, please link me. 

BEST,

Raj

[etfrench]

Make the parameters relative to each other.  Formulas work well in parameters. You can also use constraints like midpoints.

[Anonymous]

The slots that you create have to be referenced to the overall design distances from side to side with heights and locations… Then they will change