Extending the length of ground tiles in Lemmix?

[Craig3410]

How do you extend the length of extendable tiles in Lemmix? I've looked in all the documentation and I can't figure out how 

[EricLang]

Please rephrase the question. I don't know what you mean.

[Craig3410]

Like how some of the terrain pieces can be lengthened  to make them taller (e.g. terrain piece #2 in the Fire set can be lengthened, terrain piece #1 and #0 can also be lengthened or shortened).

For example, the Columns #0 piece has a default width of 64, but when I try to change the number in the "Width" field to something other than 64, nothing happens.

[EricLang]

The Width and Height are readonly. My mistake. You cannot change the sizes of terrain/object pieces.