I am not in a place where I can test, but from memory the "with text" option works for columns that do not have "use checkmarks" checked. I remember testing adding icons to the author column keeping the display of the name. I added checkmarks and other icons.
I am not sure what you are saying about the read column. You should be able to add an icon to any column you want if read is true assuming it is a yes/no column.
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