Toggle one or more Rems between showing bullets and showing numbers using the /list item /-menu item or omnibar action. You can also press Ctrl+Alt+L (Cmd+Opt+L on a Mac) to activate this option.

You can also convert the first Rem in a list to a numbered point by typing a number and a period at the start of the list, like 1. Use /list item to put them back.

Watch the following GIF for examples of all of these options: