Whether your campaign is live or in draft mode, you will always have the option to edit your campaign settings if needed. This includes the gift collection, budget, greeting message, etc.
To edit your campaign, navigate to the Campaigns tab → hover over the campaign you would like to edit → select the three dots on the right-hand side → select "Continue editing" if it is a Draft campaign, or "Edit" if it is a Live campaign.
Please Note: Any changes made will automatically be saved, so you won't need to relaunch your campaign. Simply refresh your webpage for the changes to be reflected for future sends.