[Beltonmike]

I've created a custom column "#read_m" and I'm trying to write a template for the send to device button (on the Preferences> sending books to devices page) which will write an "m" in that column. So far I've tried

{author_sort}/{title} - {authors} {#read_m:ifempty(m)}

{author_sort}/{title} - {authors} - {#read_mrint(test)}

{#read_m:ifempty(m)}

{#read_mrint(test)}

and various variations but nothing works for me. Am I trying to do something impossible or just not savy enough at coding