The donation form appearance can be "shortened" by enabling the multiple designations feature. This will let the donor move through several steps; thus, each step will have fewer fields so the form/screen appear shorter in each one. Keep in mind that this will allow donors to make gifts that will create split gifts in The Raiser's Edge. To enable this:
  1. Edit the donation form part
  2. Under Designations, mark the checkbox to 'Support multiple designations'
  3. Save

OR

Create separate donation forms and pages with specific giving options enabled on each one. For example, create a form just for Tribute gifts, another form just for recurring gifts, and so on.