In the budgets overview you can see the progress of your budgets. 
With every new payment the budget-bar goes on further to the rigth side.

This is how you can edit your budgets: 

In the budget's details you can edit the budget (on macOS please click on 'Edit' in the bottom right):

• Category: click on the category and then choose the new category from the list of categories
• Name: Here you can edit the individuel name for your budget
• Amount: click on the value and enter the new value for your budget
• Tags and Categories: click on 'Edit Tags' or 'Edit Categories' and add new tags / categories or delete tags / categories. Please note that every budget has to have at least one tag / category assigned.