[TYPO3-english] Trigger template design with TypoScript

[Mario Sargac]

Hello,

How would be possible to trigger an appropriate template design for 
desired pages only using TypoScript, not having to choose it from a Edit 
Page form dropdowns?

I would like to define relevant template designs (TemplaVoila) from one 
place using TypoScript and conditions, like this:

-------- TS START ----------
[globalVar = TSFE:id={$id_homepage}]
... use this template for a homepage ... <-- here I would like to tell 
Typo3 to use certain template, but don't know how
[global]
-------- TS END ----------

Best,
Mario