Why is the same density plot displayed differently between 2d and 3d?  I am using the transform command from plottools so I suspect that's the way it works, however I prefer the way it looks in 2d.  Is there a way to keep it the looking the same in 3d? 

Maybe it will be fixed in an update?  Maybe an alternate way exists?  Take a look

I used to know.  But I can't find it with google and I can't remember how to do it. 

In animate how do I blank out the numbers at the top of an animation plot?

I haven't really explored the use of dials and gauges.  Normally the data responds to the dial settings, but does it work in reverse?  Can we have the gauges set up so that they respond to the data, during for example say an animation or something?

 I don't really have anything specific in mind, I was just wondering if it could be done.

I'm finding limited information on how to do row or column operations on Arrays.  For example how to multiply a whole column by one number.  I have tried using the map command .... 

map(a->[a[1],-3*a[2],a[3]],a)  # multiply the third row in the array by -3 however brings an error.

This doesn't work for Array however it works on lists.  At the moment I can't think of how to do it without converting it to a list.  Any ideas?

I'm trying to get a blank procedure call to work.  How can I go about doing that?

I wanted to do something like this

changedir:=proc(change)
  if change=NULL then currentdir("f:/") else currentdir(change) end if:
end proc:

changedir()
Error, invalid input: changedir uses a 1st argument, change, which is missing