You can convert any normal buy or snipe task by clicking the icon at the far right of your task
Choose how many workers you wish to submit your txn with. Each worker (proxy) used will multiply your buy for that amount in the same transaction.
ex. If you have set your task to snipe 1000 tokens to hit the exact max limit buy and you have set 5 workers, you'll buy 5000 tokens in 1 txn using 5 proxies total. This is a great way to efficiently buy as many tokens as you want regardless of max buy limits.