How to include my existing custom field to all cards - I can't use copy option

[PMD Info]

Hi ,

Always I'm using my every cards for a similar purpose. For that I need to include my existing custom field on all cards - I can't use copy option. 

Please help

[Allen -Amazing PowerUps-]

I may be misunderstanding, but when using custom fields you automatically get all the fields on all the cards on the board.  So they should be showing up for you.

If you are looking for a bit more control over which fields are visible on which cards or who can see them, then you may want to investigate Amazing Fields .  It is a powerup that can provide fields on your cards but with more options than custom fields.  (styling, customization, calculations, visibility, etc)