Hi Andrew, 

you wrote:
>Rebol has made this exceedingly hard to do (oops, meant "easy").  Try
something like this to keep your vars local to your function.
>
>display|image: func [ 
>src 
>text.align 
>alt
>/local src text.align alt
>] [
>block of code....
>]

Once you declare an argument arg within a function's argument block:

f: func [arg] []

arg is local to f. You do not need to redeclare it local by using /local.

We set arg to a value:
>> arg: 1
== 1

We create a function, f, whose argument happens to also be called arg:

>> f: func [arg] [ print ["in f arg has the value" arg] ]

We call f with a different value. f's arg will be assigned this value:

>> f 3
in f arg has the value 3

But our global arg has retained its original value:
>> arg
== 1

Elan

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