Method of choice for dealing with this was copying sample line several times and then modifying variable fields by navigating to them with cursor keys or mouse, which feels like it takes surprisingly lot of time and effort. I found a better way, First, put the line {name:"#", price:#, leftover:#}, in the t register ("tY). # is a marker location for data fields. Any other unused symbol can be used instead. Then make the following mappings: :imap f#s :imap "tpf#s Do not forget :iunmap when you are done. You may also want to unmap Tab, but I never use it anyway.