how can i adjust distance between columns?

[decide-you]

main question in title. im also wondering if i can change the width value in this command, is there such an option? cliphist list | rofi -dmenu | cliphist decode | wl-copy

[DaveDavenport]

it display whatever cliphist outputs.. so maybe that can format it differently?
If it uses 'tabs' you might also be able to adjust the theme to have a different tab offset. (see man rofi-theme -> tab-stops)