Most are using 0 rebinded to W key for shift+w Ctrl+w and W to select the "0" group.
You bind your main and main queen on the same button to 4, your nat+nat queen to 5, your third+queen to 6
Your injects are as such: 44vclick 55vclick 66vclick. To select all hatches and all larvae it's W then S.
the first time you hit 4 it selects your queen and your hatch. the second time it focuses on them. The V then selects inject and you click onto the hatch you're already centered on.
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