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If you use PeakD, it's on the dropdown. If you use vessel, there's a option to send it to savings. I don't use other platforms so I can't help out on them, but there's probably a way and if there isn't, it can be added.

It depends on what wallet you use. In the command-line wallet, you use "transfer_to_savings" command. on wallet.hive.blog, it looks like this:

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