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Thank you! Should have realized that it was the same as the rule's X / Y values.

Hi - I'm trying to understand the lightspeed bubble pattern in Golly (and familiarize myself with GOL in general), and it uses this rule:

B3/S23:T600,136

I understand the b and s, but what is the T:600,136?

Can someone explain this, or even better, where to find a thorough explanation of ...